| Violation ID |
Occurred Date |
Violation Type |
(-) Violation Description |
Corrective Action |
Status |
Classification |
Source |
| 1139434 |
12/22/2024 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 920 MPN/100 mL at EFF-001-D. |
The coliform violations likely occurred due to adjustments in UV and chlorination as the new MBR and UV facilities are coming online. The last of the violations occurred on 12/22; There have been no elevated coliform results since that time (through 1/13, the most recent available data). |
Violation |
U |
eSMR |
| 1139432 |
12/19/2024 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 1600 MPN/100 mL at EFF-001-D. |
The coliform violations likely occurred due to adjustments in UV and chlorination as the new MBR and UV facilities are coming online. The last of the violations occurred on 12/22; There have been no elevated coliform results since that time (through 1/13, the most recent available data). |
Violation |
U |
eSMR |
| 1139433 |
12/17/2024 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 540 MPN/100 mL at EFF-001-D. |
The coliform violations likely occurred due to adjustments in UV and chlorination as the new MBR and UV facilities are coming online. The last of the violations occurred on 12/22; There have been no elevated coliform results since that time (through 1/13, the most recent available data). |
Violation |
U |
eSMR |
| 1138298 |
11/30/2024 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 49 MPN/100 mL at EFF-001-D. |
The coliform violation likely occurred due to poor performance of the aging WWTRP, especially given the increased influent flows in the second half of the month; downtown St. Helena received over 11 inches of rain in the 72-hour period of 11/20/24-11/23/24. As the flow subsided, December results to date show low to non-detect coliform results. The City is in the final stages of upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1138299 |
11/30/2024 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average (Mean) limit is 15 mg/L and reported value was 24 mg/L at EFF-001-D. |
The TSS violations likely occurred due to poor performance of the aging WWTRP, especially given the increased influent flows in the second half of the month; downtown St. Helena received over 11 inches of rain in the 72-hour period of 11/20/24-11/23/24. The City is in the final stages of upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1138300 |
11/30/2024 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average (Mean) limit is 20 mg/L and reported value was 24 mg/L at EFF-001-D. |
The TSS violations likely occurred due to poor performance of the aging WWTRP, especially given the increased influent flows in the second half of the month; downtown St. Helena received over 11 inches of rain in the 72-hour period of 11/20/24-11/23/24. The City is in the final stages of upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1138301 |
11/30/2024 |
CAT2 |
Copper, Total Recoverable 1-Hour Average (Mean) limit is 8.3 ug/L and reported value was 9.0 ug/L at EFF-001. |
The cause of the copper exceedance is unknown; the result for a sample taken a week later, on 12/3, was 7.9 µg/L, in compliance with the AMEL. The City will investigate further if the issue reoccurs. |
Violation |
U |
eSMR |
| 1128179 |
04/30/2024 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 15 mg/L and reported value was 41.7 mg/L at EFF-001-D. |
The TSS and coliform violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1128194 |
04/20/2024 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 20 mg/L and reported value was 32 mg/L at EFF-001-D. |
The TSS and coliform violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1128187 |
04/16/2024 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 79 MPN/100 mL at EFF-001-D. |
The TSS and coliform violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1128186 |
04/15/2024 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 33 MPN/100 mL at EFF-001-D. |
The TSS and coliform violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1128185 |
04/14/2024 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 130 MPN/100 mL at EFF-001-D. |
The TSS and coliform violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1128178 |
04/13/2024 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 20 mg/L and reported value was 46 mg/L at EFF-001-D. |
The TSS and coliform violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1128181 |
04/12/2024 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 1600 MPN/100 mL at EFF-001-D. |
The TSS and coliform violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1128192 |
04/10/2024 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 49 MPN/100 mL at EFF-001-D. |
The TSS and coliform violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1128189 |
04/10/2024 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 1600 MPN/100 mL at EFF-001-D. |
The TSS and coliform violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1128180 |
04/06/2024 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 20 mg/L and reported value was 47 mg/L at EFF-001-D. |
The TSS and coliform violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1128182 |
04/01/2024 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 33 MPN/100 mL at EFF-001-D. |
The TSS and coliform violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1126567 |
03/31/2024 |
CAT1 |
Ammonia, Total (as N) Monthly Average limit is 7.8 mg/L and reported value was 8.4 mg/L at EFF-001. |
The monthly ammonia effluent average was 8.3 mg/L in March, in excess of the AMEL of 7.8 mg/L. The ammonia effluent monthly average was based on results from accelerated daily sampling which was triggered from a previous limit violation.
The TSS, ammonia, and coliform violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit.
|
Violation |
B |
eSMR |
| 1126566 |
03/31/2024 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 15 mg/L and reported value was 23.75 mg/L at EFF-001-D. |
The TSS, ammonia, and coliform violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. The TSS exceedances are below the interim limits assigned in CDO Order No. R2-2016-0004. |
Violation |
U |
eSMR |
| 1126562 |
03/30/2024 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 20 mg/L and reported value was 30.0 mg/L at EFF-001-D. |
The TSS, ammonia, and coliform violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. The TSS exceedances are below the interim limits assigned in CDO Order No. R2-2016-0004. |
Violation |
B |
eSMR |
| 1126563 |
03/23/2024 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 20 mg/L and reported value was 27.0 mg/L at EFF-001-D. |
The TSS, ammonia, and coliform violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. The TSS exceedances are below the interim limits assigned in CDO Order No. R2-2016-0004. |
Violation |
B |
eSMR |
| 1126565 |
03/22/2024 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 41 MPN/100 mL at EFF-001-D. |
The TSS, ammonia, and coliform violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1126564 |
03/20/2024 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 49 MPN/100 mL at EFF-001-D. |
The TSS, ammonia, and coliform violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1126561 |
03/16/2024 |
OEV |
Total Coliform Maximum Daily (MDEL) limit is 240 MPN/100 mL and reported value was 1600 MPN/100 mL at EFF-001-D. |
This high coliform appears to be an anomaly. Total coliform was ND the day before and 2 MPN/100mL the day after this high result. |
Violation |
U |
eSMR |
| 1125345 |
02/29/2024 |
CAT1 |
Ammonia, Total (as N) Monthly Average limit is 7.8 mg/L and reported value was 15.7 mg/L at EFF-001. |
The ammonia violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. The City is continuing accelerated monitoring for ammonia. |
Violation |
U |
eSMR |
| 1125341 |
02/22/2024 |
CAT1 |
Ammonia, Total (as N) Maximum Daily (MDEL) limit is 16 mg/L and reported value was 18 mg/L at EFF-001. |
The ammonia violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. The City is continuing accelerated monitoring for ammonia. |
Violation |
U |
eSMR |
| 1125343 |
02/21/2024 |
CAT1 |
Ammonia, Total (as N) Maximum Daily (MDEL) limit is 16 mg/L and reported value was 17 mg/L at EFF-001. |
The ammonia violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. The City is continuing accelerated monitoring for ammonia. |
Violation |
U |
eSMR |
| 1125344 |
02/18/2024 |
CAT1 |
Ammonia, Total (as N) Maximum Daily (MDEL) limit is 16 mg/L and reported value was 19 mg/L at EFF-001. |
The ammonia violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. The City is continuing accelerated monitoring for ammonia. |
Violation |
U |
eSMR |
| 1125337 |
02/03/2024 |
CAT1 |
Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) Weekly Average limit is 25 mg/L and reported value was 29 mg/L at EFF-001-D. |
The 2/3/24 weekly average was based on a sample collected on 1/31. The result was below the interim AWEL of 45 mg/L assigned in CDO Order No. R2-2016-0004. The violation likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1125346 |
02/01/2024 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 110 MPN/100 mL at EFF-001-D. |
Total coliform exceedances were experienced 2/1-2/4 with concentrations stabilizing later in the month. The total coliform violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1125338 |
02/01/2024 |
OEV |
Total Coliform Maximum Daily (MDEL) limit is 240 MPN/100 mL and reported value was 1600 MPN/100 mL at EFF-001-D. |
Total coliform exceedances were experienced 2/1-2/4 with concentrations stabilizing later in the month. The total coliform violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1124668 |
01/31/2024 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 110 MPN/100 mL at EFF-001-D. |
The BOD, TSS, ammonia, and coliform violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1124667 |
01/31/2024 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 350 MPN/100 mL at EFF-001-D. |
The BOD, TSS, ammonia, and coliform violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1124671 |
01/31/2024 |
CAT1 |
Ammonia, Total (as N) Monthly Average (Mean) limit is 7.8 mg/L and reported value was 14 mg/L at EFF-001. |
The WWTRP has not experienced ammonia non-compliance in the past. This result is unusual. Accelerated monitoring was initiated to determine whether this is a persistent problem. It is also possible that this violation is related to the poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1124659 |
01/31/2024 |
CAT1 |
Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) Monthly Average (Mean) limit is 15 mg/L and reported value was 22 mg/L at EFF-001-D. |
The BOD, TSS, ammonia, and coliform violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
B |
eSMR |
| 1124666 |
01/31/2024 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average (Mean) limit is 15 mg/L and reported value was 28.3 mg/L at EFF-001-D. |
The BOD, TSS, ammonia, and coliform violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1124665 |
01/31/2024 |
CAT1 |
Total Suspended Solids (TSS), Percent Removal Percent Reduction limit is 85 % and reported value was 83.7 % at EFF-001-D. |
The minimum required 85% percent removal for TSS was not met this month. The BOD, TSS, and coliform violations this month likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1124670 |
01/31/2024 |
CAT2 |
Copper, Total Recoverable Monthly Average limit is 8.3 ug/L and reported value was 14 ug/L at EFF-001. |
The City is investigating potential elevated copper levels in the wastewater influent. In addition to increased monitoring frequencies at the WWTRP, the City has also monitored the water supply and inventory potential commercial contributors in the service area. The Cityżs drinking water treatment plant initiated an orthopolyphosphate addition program to reduce the corrosive potential of the water supply. In January 2024, we also collected weekly copper samples at the WWTRP effluent from the chlorine contact basin (EFF-001D, a permit-designated monitoring location for other constituents). The City will continue to test the WWTRP influent to evaluate potential copper reductions in the influent from this program. The City has also initiated accelerated effluent monitoring for copper. |
Violation |
U |
eSMR |
| 1124658 |
01/27/2024 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average (Mean) limit is 20 mg/L and reported value was 30 mg/L at EFF-001-D. |
The BOD, TSS, and coliform violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1124673 |
01/20/2024 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average (Mean) limit is 20 mg/L and reported value was 31 mg/L at EFF-001-D. |
The BOD, TSS, and coliform violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1124672 |
01/13/2024 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average (Mean) limit is 20 mg/L and reported value was 36 mg/L at EFF-001-D. |
The BOD, TSS, and coliform violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120734 |
03/31/2023 |
CAT1 |
Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) Monthly Average (Mean) limit is 15 mg/L and reported value was 31.5 mg/L at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120741 |
03/31/2023 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average (Mean) limit is 15 mg/L and reported value was 44.75 mg/L at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120742 |
03/31/2023 |
CAT1 |
Total Suspended Solids (TSS), Percent Removal Percent Reduction limit is 85 % and reported value was 81.1 % at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120695 |
03/29/2023 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 220 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120709 |
03/28/2023 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 220 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120708 |
03/27/2023 |
OEV |
Total Coliform 5-Sample Median limit is 23.0 MPN/100 mL and reported value was 240.0 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
B |
eSMR |
| 1120727 |
03/27/2023 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 350 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120707 |
03/26/2023 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 130 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120706 |
03/25/2023 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 130 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120736 |
03/25/2023 |
CAT1 |
Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) Weekly Average (Mean) limit is 25 mg/L and reported value was 46 mg/L at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. The result is below the interim limit. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
B |
eSMR |
| 1120704 |
03/23/2023 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 350 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120726 |
03/23/2023 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 1600 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120703 |
03/22/2023 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 220 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120702 |
03/21/2023 |
OEV |
Total Coliform Daily Maximum limit is 23 MPN/100 mL and reported value was 220 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120761 |
03/21/2023 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 350 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120740 |
03/21/2023 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average (Mean) limit is 25 mg/L and reported value was 46 mg/L at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120694 |
03/20/2023 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 220 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120693 |
03/19/2023 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 350 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120744 |
03/19/2023 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 1600 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120733 |
03/18/2023 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 350 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120735 |
03/18/2023 |
CAT1 |
Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) Weekly Average (Mean) limit is 25 mg/L and reported value was 30 mg/L at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. The result is below the interim limit. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
B |
eSMR |
| 1120731 |
03/16/2023 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 1600 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120760 |
03/16/2023 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 350 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120730 |
03/15/2023 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 1600 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120759 |
03/15/2023 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 1600 MPN/100 mL at EFF-001. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120725 |
03/14/2023 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 1600 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120758 |
03/14/2023 |
OEV |
Total Coliform Daily Maximum limit is 240 mg/L and reported value was 1600 mg/L at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120739 |
03/14/2023 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average (Mean) limit is 25 mg/L and reported value was 37 mg/L at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. The result is below the interim limit. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120728 |
03/13/2023 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 1600 MPN/100 mL. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120756 |
03/13/2023 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 1600 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120755 |
03/12/2023 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 1600 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120757 |
03/12/2023 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 1600 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120754 |
03/11/2023 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 350 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120745 |
03/11/2023 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 1600 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120750 |
03/10/2023 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 350 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120729 |
03/10/2023 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 1600 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120753 |
03/09/2023 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 350 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120715 |
03/09/2023 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 350 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120722 |
03/09/2023 |
OEV |
pH Instantaneous Maximum limit is 8.5 SU and reported value was 8.6 SU at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
B |
eSMR |
| 1120751 |
03/08/2023 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 350 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120714 |
03/08/2023 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 350 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120752 |
03/08/2023 |
OEV |
pH Instantaneous Maximum limit is 8.5 SU and reported value was 8.7 SU at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
B |
eSMR |
| 1120749 |
03/07/2023 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 350 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120713 |
03/07/2023 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 350 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120721 |
03/07/2023 |
OEV |
pH Instantaneous Maximum limit is 8.5 SU and reported value was 8.6 SU at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
B |
eSMR |
| 1120737 |
03/07/2023 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average (Mean) limit is 25 mg/L and reported value was 56 mg/L at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120748 |
03/06/2023 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 350 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120720 |
03/06/2023 |
OEV |
pH Instantaneous Maximum limit is 8.5 SU and reported value was 8.7 SU at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
B |
eSMR |
| 1120701 |
03/05/2023 |
OEV |
pH Instantaneous Maximum limit is 8.5 SU and reported value was 8.7 SU at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
B |
eSMR |
| 1120711 |
03/04/2023 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 350 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120718 |
03/04/2023 |
OEV |
pH Instantaneous Maximum limit is 8.5 SU and reported value was 9.1 SU at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
B |
eSMR |
| 1114630 |
03/03/2023 |
LREP |
Monthly SMR ( MONNPDES ) report for January 2023 (2497077) was due on 02-MAR-23 |
|
Violation |
B |
Report |
| 1120710 |
03/03/2023 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 350 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120724 |
03/03/2023 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 350 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120717 |
03/03/2023 |
OEV |
pH Instantaneous Maximum limit is 8.5 SU and reported value was 9.0 SU at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
B |
eSMR |
| 1120747 |
03/02/2023 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 240 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120723 |
03/02/2023 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 1600 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120719 |
03/02/2023 |
OEV |
pH Instantaneous Maximum limit is 8.5 SU and reported value was 8.9 SU at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
B |
eSMR |
| 1120738 |
03/02/2023 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average (Mean) limit is 25 mg/L and reported value was 40 mg/L at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. The result is below the interim limit. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120746 |
03/01/2023 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 240 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120712 |
03/01/2023 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 1600 MPN/100 mL at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. At the time this sample was taken, the City was conducting accelerated monitoring. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1120716 |
03/01/2023 |
OEV |
pH Instantaneous Maximum limit is 8.5 SU and reported value was 8.8 SU at EFF-001-D. |
The BOD, TSS, pH and total coliform exceedances likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
B |
eSMR |
| 1114695 |
01/31/2023 |
DMON |
Effluent total coliform and E. coli monitoring is required weekly at EFF-001D during periods of discharge to the Napa River; this sampling was missed this month.
Effluent and influent BOD and TSS monitoring is required weekly at EFF-001D during periods of discharge to the Napa River; in January, four weekly samples should have been collected. Sampling was conducted, but not at the required frequency. Influent and effluent TSS monitoring was conducted once, as was influent BOD. Effluent BOD monitoring was conducted twice.
pH measurements are required daily, at monitoring locations EFF-001 and EFF-001D, when discharging to the Napa River. Daily measurements were taken at EFF-001, but some were missed at EFF-001D. pH measurements at EFF-001D were not recorded on weekends and holidays this month (1/1-1/2, 1/7- 1/8, 1/14-1/16, 1/21-1/22).
Effluent cyanide monitoring is required monthly at EFF-001 during periods of discharge to the Napa River; this sampling was missed this month.
|
Regarding the missed pH, BOD, TSS, E. coli, and cyanide sampling, the City revised procedures so this type of monitoring will not be missed in the future.
Regarding missed total coliform sampling, there was a misunderstanding of the direction from the Regional Water Board staff and consequently City staff collected samples at an inappropriate location. Samples were collected at EFF-001 (past the pond), instead of EFF-001D (immediately after disinfection in the chlorine contact basin). Regional Water Board staff followed up with a clarification on this issue on February 7 and City staff have been collecting samples at the correct location since.
|
Violation |
U |
eSMR |
| 1114697 |
01/31/2023 |
CAT1 |
Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) Monthly Average (Mean) limit is 15 mg/L and reported value was 35 mg/L at EFF-001-D. |
The BOD, TSS, and possibly copper violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit |
Violation |
U |
eSMR |
| 1114698 |
01/31/2023 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average (Mean) limit is 15.0 mg/L and reported value was 25 mg/L at EFF-001-D. |
The BOD, TSS, and possibly copper violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
B |
eSMR |
| 1114699 |
01/31/2023 |
CAT1 |
Total Suspended Solids (TSS), Percent Removal Monthly Average (Mean) limit is 85 % and reported value was 70.2 % at EFF-001-D. |
The BOD, TSS, and possibly copper violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit |
Violation |
U |
eSMR |
| 1114693 |
01/31/2023 |
CAT2 |
Copper, Total Monthly Average (Mean) limit is 8.3 ug/L and reported value was 11 ug/L at EFF-001. |
Regarding copper - elevated effluent concentrations have occasionally been noted in past discharge events, but particularly high levels persisted starting in December 2021. The City has been conducting daily accelerated monitoring when discharging to the Napa River since December 2021. In 2022, copper effluent concentrations ranged from 9.7 µg/L to 39 µg/L; the January 2023 were in the lower range, from 6.6 µg/L to 25 µg/L. While the overall downward trend is encouraging, the reason for the exceedances is unknown but suspected to be related to the aging WWTRP or caused by elevated copper concentration in the wastewater influent. The City has been measuring influent copper since January 2022 and obtained results ranging from 31 µg/L to 130 µg/L. In January 2023, influent copper was 52 µg/L on 1/5 and 32 µg/L on 1/19. In addition to increased monitoring frequencies at the WWTRP, the City has also monitored the water supply and inventory potential commercial contributors in the service area. The Cityżs drinking water treatment plant initiated an orthopolyphosphate addition program to reduce the corrosive potential of the water supply. The City will continue to test the WWTRP influent to evaluate potential copper reductions in the influent from this program. |
Violation |
U |
eSMR |
| 1114702 |
01/21/2023 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average (Mean) limit is 20 mg/L and reported value was 25 mg/L at EFF-001-D. |
The BOD, TSS, and possibly copper violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1114700 |
01/08/2023 |
CAT2 |
Copper, Total Daily Maximum limit is 14 ug/L and reported value was 16 ug/L at EFF-001. |
Regarding copper - elevated effluent concentrations have occasionally been noted in past discharge events, but particularly high levels persisted starting in December 2021. The City has been conducting daily accelerated monitoring when discharging to the Napa River since December 2021. In 2022, copper effluent concentrations ranged from 9.7 µg/L to 39 µg/L; the January 2023 were in the lower range, from 6.6 µg/L to 25 µg/L. While the overall downward trend is encouraging, the reason for the exceedances is unknown but suspected to be related to the aging WWTRP or caused by elevated copper concentration in the wastewater influent. The City has been measuring influent copper since January 2022 and obtained results ranging from 31 µg/L to 130 µg/L. In January 2023, influent copper was 52 µg/L on 1/5 and 32 µg/L on 1/19. In addition to increased monitoring frequencies at the WWTRP, the City has also monitored the water supply and inventory potential commercial contributors in the service area. The Cityżs drinking water treatment plant initiated an orthopolyphosphate addition program to reduce the corrosive potential of the water supply. The City will continue to test the WWTRP influent to evaluate potential copper reductions in the influent from this program. |
Violation |
U |
eSMR |
| 1114703 |
01/07/2023 |
CAT1 |
Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) Weekly Average (Mean) limit is 25.0 mg/L and reported value was 47.0 mg/L at EFF-001-D. |
The BOD, TSS, and possibly copper violations likely occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
B |
eSMR |
| 1114701 |
01/07/2023 |
CAT2 |
Copper, Total Daily Maximum limit is 14 ug/L and reported value was 25 ug/L at EFF-001. |
Regarding copper - elevated effluent concentrations have occasionally been noted in past discharge events, but particularly high levels persisted starting in December 2021. The City has been conducting daily accelerated monitoring when discharging to the Napa River since December 2021. In 2022, copper effluent concentrations ranged from 9.7 µg/L to 39 µg/L; the January 2023 were in the lower range, from 6.6 µg/L to 25 µg/L. While the overall downward trend is encouraging, the reason for the exceedances is unknown but suspected to be related to the aging WWTRP or caused by elevated copper concentration in the wastewater influent. The City has been measuring influent copper since January 2022 and obtained results ranging from 31 µg/L to 130 µg/L. In January 2023, influent copper was 52 µg/L on 1/5 and 32 µg/L on 1/19. In addition to increased monitoring frequencies at the WWTRP, the City has also monitored the water supply and inventory potential commercial contributors in the service area. The Cityżs drinking water treatment plant initiated an orthopolyphosphate addition program to reduce the corrosive potential of the water supply. The City will continue to test the WWTRP influent to evaluate potential copper reductions in the influent from this program. |
Violation |
U |
eSMR |
| 1114694 |
01/06/2023 |
CAT2 |
Copper, Total Daily Maximum limit is 14 ug/L and reported value was 15 ug/L at EFF-001. |
Regarding copper - elevated effluent concentrations have occasionally been noted in past discharge events, but particularly high levels persisted starting in December 2021. The City has been conducting daily accelerated monitoring when discharging to the Napa River since December 2021. In 2022, copper effluent concentrations ranged from 9.7 µg/L to 39 µg/L; the January 2023 were in the lower range, from 6.6 µg/L to 25 µg/L. While the overall downward trend is encouraging, the reason for the exceedances is unknown but suspected to be related to the aging WWTRP or caused by elevated copper concentration in the wastewater influent. The City has been measuring influent copper since January 2022 and obtained results ranging from 31 µg/L to 130 µg/L. In January 2023, influent copper was 52 µg/L on 1/5 and 32 µg/L on 1/19. In addition to increased monitoring frequencies at the WWTRP, the City has also monitored the water supply and inventory potential commercial contributors in the service area. The Cityżs drinking water treatment plant initiated an orthopolyphosphate addition program to reduce the corrosive potential of the water supply. The City will continue to test the WWTRP influent to evaluate potential copper reductions in the influent from this program. |
Violation |
U |
eSMR |
| 1114696 |
01/05/2023 |
CAT2 |
Copper, Total Daily Maximum limit is 14 ug/L and reported value was 17 ug/L at EFF-001. |
Regarding copper - elevated effluent concentrations have occasionally been noted in past discharge events, but particularly high levels persisted starting in December 2021. The City has been conducting daily accelerated monitoring when discharging to the Napa River since December 2021. In 2022, copper effluent concentrations ranged from 9.7 µg/L to 39 µg/L; the January 2023 were in the lower range, from 6.6 µg/L to 25 µg/L. While the overall downward trend is encouraging, the reason for the exceedances is unknown but suspected to be related to the aging WWTRP or caused by elevated copper concentration in the wastewater influent. The City has been measuring influent copper since January 2022 and obtained results ranging from 31 µg/L to 130 µg/L. In January 2023, influent copper was 52 µg/L on 1/5 and 32 µg/L on 1/19. In addition to increased monitoring frequencies at the WWTRP, the City has also monitored the water supply and inventory potential commercial contributors in the service area. The Cityżs drinking water treatment plant initiated an orthopolyphosphate addition program to reduce the corrosive potential of the water supply. The City will continue to test the WWTRP influent to evaluate potential copper reductions in the influent from this program. |
Violation |
U |
eSMR |
| 1111270 |
12/01/2022 |
LREP |
Monthly SMR ( MONNPDES ) report for October 2022 (2497060) was due on 30-NOV-22 |
|
Violation |
B |
Report |
| 1106154 |
07/01/2022 |
LREP |
Monthly SMR ( MONNPDES ) report for May 2022 (2497055) was due on 30-JUN-22 |
|
Violation |
B |
Report |
| 1109823 |
03/31/2022 |
DMON |
Deficient monitoring of ammonia for Quarter 1 of 2022. |
|
Violation |
B |
Report |
| 1102836 |
02/28/2022 |
DMON |
E. Coli sampling is required weekly, when discharging to the river. These analyses were requested on the Chain of Custody forms but were not performed by the Cityżs contracted lab during the February discharge period. The City alerted the lab to the issue and they will provide the required analyses moving forward. pH and temperature measurements are required daily, at monitoring location EFF-001, when discharging to the river. Operators missed this required. They were made aware of the requirement and will record these values during future discharge events. On 2/16, while discharging to the river, operators missed a series of required at EFF-001D sampling, when discharging to the river. EFF-001D samples were collected on 2/17 instead, but by then discharge had stopped. Operators were made aware of the issue and EFF-001D samples will be collected on days of discharge in the future. |
E. Coli sampling is required weekly, when discharging to the river. These analyses were requested on the Chain of Custody forms but were not performed by the Cityżs contracted lab during the February discharge period. The City alerted the lab to the issue and they will provide the required analyses moving forward. pH and temperature measurements are required daily, at monitoring location EFF-001, when discharging to the river. Operators missed this required. They were made aware of the requirement and will record these values during future discharge events. On 2/16, while discharging to the river, operators missed a series of required at EFF-001D sampling when discharging to the river. EFF-001D samples were collected on 2/17 instead, but by then discharge had stopped. Operators were made aware of the issue and EFF-001D samples will be collected on days of discharge in the future. |
Violation |
U |
eSMR |
| 1109796 |
02/28/2022 |
DMON |
Failure to sample for pH and temperature. |
|
Violation |
B |
Report |
| 1102837 |
02/28/2022 |
CAT1 |
Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) Monthly Average limit is 15 mg/L and reported value was 36 mg/L at EFF-001-D. |
The BOD monthly average also exceeds CDO interim AMEL of 30 mg/L. The BOD and TSS violations occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1102830 |
02/28/2022 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 15 mg/L and reported value was 35 mg/L at EFF-001-D. |
The monthly average also exceeds the CDO interim AMEL of 30 mg/L. The BOD and TSS violations occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1102838 |
02/28/2022 |
CAT2 |
Copper, Total Recoverable Monthly Average limit is 8.3 ug/L and reported value was 9.85 ug/L at EFF-001. |
Elevated effluent concentrations have occasionally been noted in past discharge events, but particularly high levels persisted starting in December 2021. Effluent copper concentrations ranged from 19 µg/L to 65 µg/L in December 2021 and 32 µg/L to 39 µg/L in January 2022. February 2022 levels were lower, but still exceeded the 8.4 µg/L AMEL. While the overall downward trend is encouraging, the reason for these exceedances is unknown. The City is investigating potential elevated copper levels in the wastewater influent. The City measured influent copper in December and the result was a relatively low level of 36 µg/L. However, more influent monitoring was conducted in January, February, and March 2022 and results were higher, ranging from 81 µg/L to 130 µg/L. The City will continue assessing copper through the remainder of the discharge season. Aside from regular influent monitoring and increasing the frequency for effluent monitoring, the City will monitor the water supply and inventory potential commercial contributors in the service area. The Cityżs drinking water treatment plant is also initiating an orthopolyphosphate addition program to reduce the corrosive potential of the water supply. We will continue to test the WWTRP influent to evaluate potential copper reductions in the influent from this program. |
Violation |
U |
eSMR |
| 1102839 |
02/12/2022 |
CAT1 |
Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) Weekly Average limit is 25 mg/L and reported value was 36 mg/L at EFF-001-D. |
The BOD and TSS violations occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. The result is in compliance with the CDO interim AWEL of 45 mg/L. |
Violation |
U |
eSMR |
| 1102833 |
02/12/2022 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 25 mg/L and reported value was 35 mg/L at EFF-001-D. |
The BOD and TSS violations occurred due to poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. The result is in compliance with the CDO interim AWEL of 45 mg/L. |
Violation |
U |
eSMR |
| 1106903 |
02/08/2022 |
OEV |
Total Coliform 5-Sample Median limit is 23 MPN/100 mL and reported value was 920 MPN/100 mL at EFF-001-D. |
It is unclear what caused the high total coliform results this month. All of the numbers for effluent are similar to what they have been in the past. The issue likely stems from the poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable treatment and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1102831 |
02/08/2022 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 1600 MPN/100 mL at EFF-001-D. |
It is unclear what caused the high total coliform results this month. All of the numbers for effluent are similar to what they have been in the past. The issue likely stems from the poor performance of the aging WWTRP. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable treatment and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1101420 |
01/31/2022 |
DMON |
E. Coli sampling is required weekly, when discharging to the river. This sampling was missed during the 4 days of January discharge (1/11 to 1/14). This is a new monitoring constituent, added in the 2021 permit. The WWTRP changed procedures so this sampling is not missed in the future. pH and temperature measurements are required daily, at monitoring location EFF-001, when discharging to the river. Operators missed this requirement during river discharge, from 1/11 to 1/14. Operators were made aware of the requirement and will record these values during future discharge events. |
E. Coli sampling is required weekly, when discharging to the river. This sampling was missed during the 4 days of January discharge (1/11 to 1/14). This is a new monitoring constituent, added in the 2021 permit. The WWTRP changed procedures so this sampling is not missed in the future. pH and temperature measurements are required daily, at monitoring location EFF-001, when discharging to the river. Operators missed this requirement during river discharge, from 1/11 to 1/14. Operators were made aware of the requirement and will record these values during future discharge events. |
Violation |
U |
eSMR |
| 1101426 |
01/31/2022 |
CAT1 |
Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) Monthly Average (Mean) limit is 15 mg/L and reported value was 16 mg/L at EFF-001-D. |
The BOD and TSS violations likely occurred due to poor performance of the aging WWTRP. The results did not exceed the interim limits established in the 2016 CDO. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1101423 |
01/31/2022 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 15 mg/L and reported value was 20 mg/L at EFF-001-D. |
The BOD and TSS violations likely occurred due to poor performance of the aging WWTRP. The results did not exceed the interim limits established in the 2016 CDO. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1101425 |
01/31/2022 |
CAT2 |
Copper, Total Monthly Average (Mean) limit is 8.3 ug/L and reported value was 35.5 ug/L at EFF-001. |
The City has been conducting daily accelerated monitoring since December 2021, when elevated copper levels in the effluent were first observed. Effluent copper concentrations ranged from 19 µg/L to 65 µg/L in December 2021 and 32 µg/L to 39 µg/L in January 2022. To date, there are two results available from February 2022; both were <14 µg/L, the analytical method detection limit. While the overall downward trend is encouraging, the reason for the December and January exceedances is unknown. The City is investigating potential elevated copper levels in the wastewater influent. The City measured influent copper in December and the result was a relatively low level of 36 µg/L. However, more influent monitoring was conducted in January and February 2022 and results were higher, ranging from 81 µg/L to 130 µg/L. The City will continue assessing copper through the remainder of the discharge season. Aside from regular influent monitoring and increasing the frequency for effluent monitoring, the City will monitor the water supply and inventory potential commercial contributors in the service area. The Cityżs drinking water treatment plant is also initiating an orthopolyphosphate addition program to reduce the corrosive potential of the water supply. We will continue to test the WWTRP influent to evaluate potential copper reductions in the influent from this program. |
Violation |
B |
eSMR |
| 1101419 |
01/31/2022 |
CAT2 |
Cyanide, Total (as CN) Monthly Average (Mean) limit is 9.3 ug/L and reported value was 16 ug/L at EFF-001. |
It is unclear what caused the cyanide elevated result on 1/12. Cyanide in the effluent was non-detect in November 2021 and measured 3 µg/L in December 2021. The monthly results from the February discharge event are pending, but we are hopeful that the January result was an anomaly. The City will consider evaluating sampling and analytical procedures and/or initiate influent sampling and potential evaluation of WWTRP contributing sources if future sampling indicates consistently elevated cyanide levels in the effluent. |
Violation |
U |
eSMR |
| 1101424 |
01/14/2022 |
CAT2 |
Copper, Total Maximum Daily (MDEL) limit is 14 ug/L and reported value was 32 ug/L at EFF-001. |
The City has been conducting daily accelerated monitoring since December 2021, when elevated copper levels in the effluent were first observed. Effluent copper concentrations ranged from 19 µg/L to 65 µg/L in December 2021 and 32 µg/L to 39 µg/L in January 2022. To date, there are two results available from February 2022; both were <14 µg/L, the analytical method detection limit. While the overall downward trend is encouraging, the reason for the December and January exceedances is unknown. The City is investigating potential elevated copper levels in the wastewater influent. The City measured influent copper in December and the result was a relatively low level of 36 µg/L. However, more influent monitoring was conducted in January and February 2022 and results were higher, ranging from 81 µg/L to 130 µg/L. The City will continue assessing copper through the remainder of the discharge season. Aside from regular influent monitoring and increasing the frequency for effluent monitoring, the City will monitor the water supply and inventory potential commercial contributors in the service area. The Cityżs drinking water treatment plant is also initiating an orthopolyphosphate addition program to reduce the corrosive potential of the water supply. We will continue to test the WWTRP influent to evaluate potential copper reductions in the influent from this program. |
Violation |
U |
eSMR |
| 1101418 |
01/13/2022 |
CAT2 |
Copper, Total Maximum Daily (MDEL) limit is 14 ug/L and reported value was 34 ug/L at EFF-001. |
The City has been conducting daily accelerated monitoring since December 2021, when elevated copper levels in the effluent were first observed. Effluent copper concentrations ranged from 19 µg/L to 65 µg/L in December 2021 and 32 µg/L to 39 µg/L in January 2022. To date, there are two results available from February 2022; both were <14 µg/L, the analytical method detection limit. While the overall downward trend is encouraging, the reason for the December and January exceedances is unknown. The City is investigating potential elevated copper levels in the wastewater influent. The City measured influent copper in December and the result was a relatively low level of 36 µg/L. However, more influent monitoring was conducted in January and February 2022 and results were higher, ranging from 81 µg/L to 130 µg/L. The City will continue assessing copper through the remainder of the discharge season. Aside from regular influent monitoring and increasing the frequency for effluent monitoring, the City will monitor the water supply and inventory potential commercial contributors in the service area. The Cityżs drinking water treatment plant is also initiating an orthopolyphosphate addition program to reduce the corrosive potential of the water supply. We will continue to test the WWTRP influent to evaluate potential copper reductions in the influent from this program. |
Violation |
U |
eSMR |
| 1101421 |
01/12/2022 |
OEV |
Total Coliform Maximum Daily (MDEL) limit is 240 MPN/100 mL and reported value was 920 MPN/100 mL at EFF-001-D. |
It is unclear what caused the high total coliform result on 1/12. Total coliform was measured at 2 MPN/ 100mL in subsequent samples collected on 1/21 and 1/27. |
Violation |
U |
eSMR |
| 1101422 |
01/12/2022 |
CAT2 |
Copper, Total Daily Maximum limit is 14 ug/L and reported value was 37 ug/L at EFF-001. |
The City has been conducting daily accelerated monitoring since December 2021, when elevated copper levels in the effluent were first observed. Effluent copper concentrations ranged from 19 µg/L to 65 µg/L in December 2021 and 32 µg/L to 39 µg/L in January 2022. To date, there are two results available from February 2022; both were <14 µg/L, the analytical method detection limit. While the overall downward trend is encouraging, the reason for the December and January exceedances is unknown. The City is investigating potential elevated copper levels in the wastewater influent. The City measured influent copper in December and the result was a relatively low level of 36 µg/L. However, more influent monitoring was conducted in January and February 2022 and results were higher, ranging from 81 µg/L to 130 µg/L. The City will continue assessing copper through the remainder of the discharge season. Aside from regular influent monitoring and increasing the frequency for effluent monitoring, the City will monitor the water supply and inventory potential commercial contributors in the service area. The Cityżs drinking water treatment plant is also initiating an orthopolyphosphate addition program to reduce the corrosive potential of the water supply. We will continue to test the WWTRP influent to evaluate potential copper reductions in the influent from this program. |
Violation |
U |
eSMR |
| 1101417 |
01/11/2022 |
CAT2 |
Copper, Total Daily Maximum limit is 14 ug/L and reported value was 39 ug/L at EFF-001. |
The City has been conducting daily accelerated monitoring since December 2021, when elevated copper levels in the effluent were first observed. Effluent copper concentrations ranged from 19 µg/L to 65 µg/L in December 2021 and 32 µg/L to 39 µg/L in January 2022. To date, there are two results available from February 2022; both were <14 µg/L, the analytical method detection limit. While the overall downward trend is encouraging, the reason for the December and January exceedances is unknown. The City is investigating potential elevated copper levels in the wastewater influent. The City measured influent copper in December and the result was a relatively low level of 36 µg/L. However, more influent monitoring was conducted in January and February 2022 and results were higher, ranging from 81 µg/L to 130 µg/L. The City will continue assessing copper through the remainder of the discharge season. Aside from regular influent monitoring and increasing the frequency for effluent monitoring, the City will monitor the water supply and inventory potential commercial contributors in the service area. The Cityżs drinking water treatment plant is also initiating an orthopolyphosphate addition program to reduce the corrosive potential of the water supply. We will continue to test the WWTRP influent to evaluate potential copper reductions in the influent from this program. |
Violation |
U |
eSMR |
| 1099836 |
01/01/2022 |
CAT1 |
Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) Weekly Average limit is 25 mg/L and reported value was 32 mg/L at EFF-001. |
The BOD violations likely occurred due to poor performance of the aging WWTRP. The results did not exceed the interim limits established in the 2016 CDO. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
B |
eSMR |
| 1099827 |
01/01/2022 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 20 mg/L and reported value was 29 mg/L at EFF-001. |
The TSS violations likely occurred due to poor performance of the aging WWTRP. The results did not exceed the interim limits established in the 2016 CDO. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
B |
eSMR |
| 1099826 |
12/31/2021 |
DMON |
Effluent E. coli monitoring is required weekly during periods of discharge to the Napa River; this sampling was not conducted until the final week of discharge, on 12/28. Unfortunately, even the 12/28 result is not available as the contract lab mistakenly returned fecal coliform results instead.
Effluent samples were collected for BOD and TSS for the week of 12/19-12/25, but the contract lab has not provided the results at this time.
Effluent pH and temperature results were not recorded on 12/9, 12/11, and 12/12. |
Effluent E. coli monitoring is required weekly during periods of discharge to the Napa River; this sampling was not conducted until the final week of discharge, on 12/28. Unfortunately, even the 12/28 result is not available as the contract lab mistakenly returned fecal coliform results instead. Operators have been instructed to request E. coli on the COCs moving forward. Also, the lab has been alerted about the missed analysis and will provide the required analyses moving forward.
Effluent samples were collected for BOD and TSS for the week of 12/19-12/25, but the contract lab has not provided the results at this time. We will include these results in the January 2022 SMR, pending receipt of the lab report.
Operators did not record effluent pH and temperature on 12/9, 12/11, and 12/12. We discussed this issue with our team and revised our procedures so this type of daily monitoring will not be missed in the future.
|
Violation |
U |
eSMR |
| 1099812 |
12/31/2021 |
CAT1 |
Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) Monthly Average limit is 15 mg/L and reported value was 23 mg/L at EFF-001. |
The BOD violations likely occurred due to poor performance of the aging WWTRP. The results did not exceed the interim limits established in the 2016 CDO. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1099828 |
12/31/2021 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 15.0 mg/L and reported value was 24.0 mg/L at EFF-001. |
The TSS violations likely occurred due to poor performance of the aging WWTRP. The results did not exceed the interim limits established in the 2016 CDO. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
B |
eSMR |
| 1099829 |
12/31/2021 |
CAT2 |
Copper, Total Monthly Average limit is 8.3 ug/L and reported value was 44 ug/L at EFF-001. |
The copper violations likely occurred due to poor performance of the aging WWTRP and possible elevated copper concentration in the wastewater influent. The City initiated influent monitoring and is evaluating the water supply and commercial dischargers to understand incoming copper loads. For the long term, WWTRP upgrades are expected to provide more reliable treatment. |
Violation |
U |
eSMR |
| 1099813 |
12/30/2021 |
CAT2 |
Chlorine, Total Residual Maximum Daily (MDEL) limit is 0.0 mg/L and reported value was 1.17 mg/L at EFF-001. |
The daily maximum of 0.0 mg/L for total residual chlorine was exceeded on 12/30 when a value of 1.17 mg/L was observed. This was likely due to a low demand for disinfection of the effluent as the WWTRP was receiving an increased volume of wastewater following periods of heavy rains. The wastewater was diluted with inflow & infiltration (I&I) of rain water. Operators adjusted the chlorine addition to resolve the issue and have been trained to adjust the chlorine addition when experiencing high I&I events in the future. |
Violation |
U |
eSMR |
| 1099817 |
12/30/2021 |
CAT2 |
Copper, Total Maximum Daily (MDEL) limit is 14 ug/L and reported value was 59 ug/L at EFF-001. |
The copper violations likely occurred due to poor performance of the aging WWTRP and possible elevated copper concentration in the wastewater influent. The City conducted accelerated monitoring and collected a total of 16 effluent copper sample in December. Unfortunately every result was above the 14 ug/L MDEL. The City initiated influent monitoring and is evaluating the water supply and commercial dischargers to understand incoming copper loads. For the long term, WWTRP upgrades are expected to provide more reliable treatment. |
Violation |
U |
eSMR |
| 1099822 |
12/29/2021 |
CAT2 |
Copper, Total Maximum Daily (MDEL) limit is 14 ug/L and reported value was 58 ug/L at EFF-001. |
The copper violations likely occurred due to poor performance of the aging WWTRP and possible elevated copper concentration in the wastewater influent. The City conducted accelerated monitoring and collected a total of 16 effluent copper sample in December. Unfortunately every result was above the 14 ug/L MDEL. The City initiated influent monitoring and is evaluating the water supply and commercial dischargers to understand incoming copper loads. For the long term, WWTRP upgrades are expected to provide more reliable treatment. |
Violation |
U |
eSMR |
| 1099821 |
12/28/2021 |
CAT2 |
Copper, Total Maximum Daily (MDEL) limit is 14 ug/L and reported value was 61 ug/L at EFF-001. |
The copper violations likely occurred due to poor performance of the aging WWTRP and possible elevated copper concentration in the wastewater influent. The City conducted accelerated monitoring and collected a total of 16 effluent copper sample in December. Unfortunately every result was above the 14 ug/L MDEL. The City initiated influent monitoring and is evaluating the water supply and commercial dischargers to understand incoming copper loads. For the long term, WWTRP upgrades are expected to provide more reliable treatment. |
Violation |
U |
eSMR |
| 1099820 |
12/27/2021 |
CAT2 |
Copper, Total Maximum Daily (MDEL) limit is 14 ug/L and reported value was 65 ug/L at EFF-001. |
The copper violations likely occurred due to poor performance of the aging WWTRP and possible elevated copper concentration in the wastewater influent. The City conducted accelerated monitoring and collected a total of 16 effluent copper sample in December. Unfortunately every result was above the 14 ug/L MDEL. The City initiated influent monitoring and is evaluating the water supply and commercial dischargers to understand incoming copper loads. For the long term, WWTRP upgrades are expected to provide more reliable treatment. |
Violation |
U |
eSMR |
| 1099825 |
12/26/2021 |
CAT2 |
Copper, Total Daily Maximum limit is 14 ug/L and reported value was 50 ug/L at EFF-001. |
The copper violations likely occurred due to poor performance of the aging WWTRP and possible elevated copper concentration in the wastewater influent. The City conducted accelerated monitoring and collected a total of 16 effluent copper sample in December. Unfortunately every result was above the 14 ug/L MDEL. The City initiated influent monitoring and is evaluating the water supply and commercial dischargers to understand incoming copper loads. For the long term, WWTRP upgrades are expected to provide more reliable treatment. |
Violation |
U |
eSMR |
| 1099823 |
12/25/2021 |
CAT2 |
Copper, Total Daily Maximum limit is 14 ug/L and reported value was 47 ug/L at EFF-001. |
The copper violations likely occurred due to poor performance of the aging WWTRP and possible elevated copper concentration in the wastewater influent. The City conducted accelerated monitoring and collected a total of 16 effluent copper sample in December. Unfortunately every result was above the 14 ug/L MDEL. The City initiated influent monitoring and is evaluating the water supply and commercial dischargers to understand incoming copper loads. For the long term, WWTRP upgrades are expected to provide more reliable treatment. |
Violation |
U |
eSMR |
| 1099815 |
12/24/2021 |
CAT2 |
Copper, Total Maximum Daily (MDEL) limit is 14 ug/L and reported value was 50 ug/L at EFF-001. |
The copper violations likely occurred due to poor performance of the aging WWTRP and possible elevated copper concentration in the wastewater influent. The City conducted accelerated monitoring and collected a total of 16 effluent copper sample in December. Unfortunately every result was above the 14 ug/L MDEL. The City initiated influent monitoring and is evaluating the water supply and commercial dischargers to understand incoming copper loads. For the long term, WWTRP upgrades are expected to provide more reliable treatment. |
Violation |
U |
eSMR |
| 1099835 |
12/23/2021 |
CAT2 |
Copper, Total Maximum Daily (MDEL) limit is 14 ug/L and reported value was 43 ug/L at EFF-001. |
The copper violations likely occurred due to poor performance of the aging WWTRP and possible elevated copper concentration in the wastewater influent. The City conducted accelerated monitoring and collected a total of 16 effluent copper sample in December. Unfortunately every result was above the 14 ug/L MDEL. The City initiated influent monitoring and is evaluating the water supply and commercial dischargers to understand incoming copper loads. For the long term, WWTRP upgrades are expected to provide more reliable treatment. |
Violation |
U |
eSMR |
| 1099834 |
12/22/2021 |
CAT2 |
Copper, Total Maximum Daily (MDEL) limit is 14 ug/L and reported value was 46 ug/L at EFF-001. |
The copper violations likely occurred due to poor performance of the aging WWTRP and possible elevated copper concentration in the wastewater influent. The City conducted accelerated monitoring and collected a total of 16 effluent copper sample in December. Unfortunately every result was above the 14 ug/L MDEL. The City initiated influent monitoring and is evaluating the water supply and commercial dischargers to understand incoming copper loads. For the long term, WWTRP upgrades are expected to provide more reliable treatment. |
Violation |
U |
eSMR |
| 1099833 |
12/21/2021 |
CAT2 |
Copper, Total Maximum Daily (MDEL) limit is 14 ug/L and reported value was 40 ug/L at EFF-001. |
The copper violations likely occurred due to poor performance of the aging WWTRP and possible elevated copper concentration in the wastewater influent. The City conducted accelerated monitoring and collected a total of 16 effluent copper sample in December. Unfortunately every result was above the 14 ug/L MDEL. The City initiated influent monitoring and is evaluating the water supply and commercial dischargers to understand incoming copper loads. For the long term, WWTRP upgrades are expected to provide more reliable treatment. |
Violation |
U |
eSMR |
| 1099819 |
12/20/2021 |
CAT2 |
Copper, Total Maximum Daily (MDEL) limit is 14 ug/L and reported value was 41 ug/L at EFF-001. |
The copper violations likely occurred due to poor performance of the aging WWTRP and possible elevated copper concentration in the wastewater influent. The City conducted accelerated monitoring and collected a total of 16 effluent copper sample in December. Unfortunately every result was above the 14 ug/L MDEL. The City initiated influent monitoring and is evaluating the water supply and commercial dischargers to understand incoming copper loads. For the long term, WWTRP upgrades are expected to provide more reliable treatment. |
Violation |
U |
eSMR |
| 1099832 |
12/19/2021 |
CAT2 |
Copper, Total Maximum Daily (MDEL) limit is 14 ug/L and reported value was 36 ug/L at EFF-001. |
The copper violations likely occurred due to poor performance of the aging WWTRP and possible elevated copper concentration in the wastewater influent. The City conducted accelerated monitoring and collected a total of 16 effluent copper sample in December. Unfortunately every result was above the 14 ug/L MDEL. The City initiated influent monitoring and is evaluating the water supply and commercial dischargers to understand incoming copper loads. For the long term, WWTRP upgrades are expected to provide more reliable treatment. |
Violation |
U |
eSMR |
| 1099814 |
12/18/2021 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 20 mg/L and reported value was 21 mg/L at EFF-001. |
The TSS violations likely occurred due to poor performance of the aging WWTRP. The results did not exceed the interim limits established in the 2016 CDO. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
B |
eSMR |
| 1099824 |
12/18/2021 |
CAT2 |
Copper, Total Daily Maximum limit is 14 ug/L and reported value was 35 ug/L at EFF-001. |
The copper violations likely occurred due to poor performance of the aging WWTRP and possible elevated copper concentration in the wastewater influent. The City conducted accelerated monitoring and collected a total of 16 effluent copper sample in December. Unfortunately every result was above the 14 ug/L MDEL. The City initiated influent monitoring and is evaluating the water supply and commercial dischargers to understand incoming copper loads. For the long term, WWTRP upgrades are expected to provide more reliable treatment. |
Violation |
U |
eSMR |
| 1099818 |
12/17/2021 |
CAT2 |
Copper, Total Maximum Daily (MDEL) limit is 14 ug/L and reported value was 25 ug/L at EFF-001. |
The copper violations likely occurred due to poor performance of the aging WWTRP and possible elevated copper concentration in the wastewater influent. The City conducted accelerated monitoring and collected a total of 16 effluent copper sample in December. Unfortunately every result was above the 14 ug/L MDEL. The City initiated influent monitoring and is evaluating the water supply and commercial dischargers to understand incoming copper loads. For the long term, WWTRP upgrades are expected to provide more reliable treatment. |
Violation |
U |
eSMR |
| 1099831 |
12/16/2021 |
CAT2 |
Copper, Total Maximum Daily (MDEL) limit is 14 ug/L and reported value was 19 ug/L at EFF-001. |
The copper violations likely occurred due to poor performance of the aging WWTRP and possible elevated copper concentration in the wastewater influent. The City conducted accelerated monitoring and collected a total of 16 effluent copper sample in December. Unfortunately every result was above the 14 ug/L MDEL. The City initiated influent monitoring and is evaluating the water supply and commercial dischargers to understand incoming copper loads. For the long term, WWTRP upgrades are expected to provide more reliable treatment. |
Violation |
U |
eSMR |
| 1099816 |
12/14/2021 |
OEV |
Total Coliform Maximum Daily (MDEL) limit is 240 MPN/100 mL and reported value was 1600 MPN/100 mL at EFF-001. |
Total coliform is analyzed weekly when discharging to the river. The total coliform daily maximum limit of 240 MPN/100mL was exceeded for the weekly sample collected 12/14 when the result was >1,600 MPN/100mL. It is unclear what caused this high result. Total coliform was non-detect in subsequent samples collected on 12/22 and 12/28. |
Violation |
U |
eSMR |
| 1099811 |
12/11/2021 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 20 mg/L and reported value was 22 mg/L at EFF-001. |
The TSS violations likely occurred due to poor performance of the aging WWTRP. The results did not exceed the interim limits established in the 2016 CDO. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
B |
eSMR |
| 1099830 |
12/08/2021 |
CAT2 |
Copper, Total Maximum Daily (MDEL) limit is 14 ug/L and reported value was 27 ug/L at EFF-001. |
The copper violations likely occurred due to poor performance of the aging WWTRP and possible elevated copper concentration in the wastewater influent. The City conducted accelerated monitoring and collected a total of 16 effluent copper samples this month. Unfortunately every result was above the 14 ug/L MDEL. The City initiated influent monitoring and is evaluating the water supply and commercial dischargers to understand incoming copper loads. For the long term, WWTRP upgrades are expected to provide more reliable treatment. |
Violation |
U |
eSMR |
| 1098615 |
11/30/2021 |
DMON |
Effluent samples were not analyzed for E.coli this month. E.coli monitoring is a new requirement in our 2021 permit and the chain of custody forms we were using had not been updated with the new requirements. This issue has been corrected and E.coli will be sampled moving forward.
pH and temperature measurements are required daily, at monitoring location EFF-001, when discharging to the river. Operators missed this requirement. pH and temperature were recorded only at monitoring location EFF-001-D (disinfected effluent entering the pond).
pH measurements are also required daily, at monitoring location EFF-001-D, when discharging to the river. Effluent samples were analyzed for pH and temperature was recorded on a weekly, instead of daily, frequency.
Total coliform sampling is required weekly at EFF-001-D, when discharging to the river. Effluent was discharged to the river from 11/16 to 11/29 this month (over three calendar weeks). Operators missed this requirement for the third week of discharge.
Influent BOD and TSS sampling are required weekly, when discharging to the river. Effluent was discharged to the river from 11/16 to 11/29 this month (over three calendar weeks). Operators missed this requirement for the second week and the third week of discharge.
Monitoring training has been provided and all sampling will be collected in the future. |
Effluent samples were not analyzed for E.coli this month. E.coli monitoring is a new requirement in our 2021 permit and the chain of custody forms we were using had not been updated with the new requirements. This issue has been corrected and E.coli will be sampled moving forward.
pH and temperature measurements are required daily, at monitoring location EFF-001, when discharging to the river. Operators missed this requirement. pH and temperature were recorded only at monitoring location EFF-001-D (disinfected effluent entering the pond).
pH measurements are also required daily, at monitoring location EFF-001-D, when discharging to the river. Effluent samples were analyzed for pH and temperature was recorded on a weekly, instead of daily, frequency.
Total coliform sampling is required weekly at EFF-001-D, when discharging to the river. Effluent was discharged to the river from 11/16 to 11/29 this month (over three calendar weeks). Operators missed this requirement for the third week of discharge.
Influent BOD and TSS sampling are required weekly, when discharging to the river. Effluent was discharged to the river from 11/16 to 11/29 this month (over three calendar weeks). Operators missed this requirement for the second week and the third week of discharge.
Monitoring training has been provided and all sampling will be collected in the future. |
Violation |
U |
eSMR |
| 1098609 |
11/30/2021 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average (Mean) limit is 15 mg/L and reported value was 19 mg/L at EFF-001-D. |
The City is in the process of upgrading the WWTRP (construction completion is expected June 2023). This result is in compliance with the CDO interim AMEL of 30 mg/L. The upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1098613 |
11/30/2021 |
CAT2 |
Copper, Total Recoverable Monthly Average limit is 8.3 ug/L and reported value was 64 ug/L at EFF-001. |
The upcoming WWTRP upgrades are expected to provide more reliable pollutant removal and full compliance with the NPDES Permit. In the meantime, the City is requesting rush analysis from the contract laboratory so potential violations are discovered in a more timely manner. The City also initiated influent monitoring to understand incoming copper loads and evaluate whether more extensive source-investigation efforts are needed. |
Violation |
U |
eSMR |
| 1098612 |
11/20/2021 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 20 mg/L and reported value was 26 mg/L at EFF-001-D. |
The City is in the process of upgrading the WWTRP (construction completion is expected June 2023). This result is in compliance with the CDO interim AWEL of 45 mg/L. The upgrades are expected to provide reliable pollutant removal and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1098614 |
11/17/2021 |
CAT2 |
Copper, Total Recoverable Maximum Daily (MDEL) limit is 14 ug/L and reported value was 64 ug/L at EFF-001. |
The upcoming WWTRP upgrades are expected to provide more reliable pollutant removal and full compliance with the NPDES Permit. In the meantime, the City is requesting rush analysis from the contract laboratory so potential violations are discovered in a more timely manner. The City also initiated influent monitoring to understand incoming copper loads and evaluate whether more extensive source-investigation efforts are needed. |
Violation |
U |
eSMR |
| 1089203 |
03/31/2021 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average (Mean) limit is 15 mg/L and reported value was 22.1 mg/L at EFF-001. |
The result is in compliance with the Cease and Desist Order Interim TSS AMEL of 30 mg/L. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades will ensure consistent removal of TSS and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1089199 |
03/27/2021 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 15 mg/L and reported value was 25 mg/L at EFF-001. |
The result is in compliance with the Cease and Desist Order Interim TSS AWEL of 45 mg/L. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades will ensure consistent removal of TSS and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1089201 |
03/25/2021 |
OEV |
Total Coliform Maximum Daily (MDEL) limit is 240 CFU/100 mL and reported value was 540 CFU/100 mL at EFF-001. |
The cause for the high result is unknown; there were not treatment issues noted that particular day. Coliform levels were non-detect the following day and remained low for the rest of the discharging period. |
Violation |
U |
eSMR |
| 1089200 |
03/24/2021 |
DMON |
Daily analysis of total coliform was missed on 3/24/2021. |
COC form included request for total coliform, but the contract lab did not pick up the sample bottle from the WWTP. The issue has been brought to their attention and they provided assurances that samples will not be missed in the future. |
Violation |
U |
eSMR |
| 1089202 |
03/20/2021 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 20 mg/L and reported value was 21.7 mg/L at EFF-001. |
The result is in compliance with the Cease and Desist Order Interim TSS AWEL of 45 mg/L. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades will ensure consistent removal of TSS and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1088163 |
02/28/2021 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 15 mg/L and reported value was 20 mg/L at EFF-001. |
The result is in compliance with the Cease and Desist Order Interim TSS AMEL of 30 mg/L. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades will ensure consistent removal of TSS and full compliance with the NPDES Permit. |
Violation |
U |
eSMR |
| 1088165 |
02/28/2021 |
CAT2 |
Copper, Total Monthly Average limit is 8.3 ug/L and reported value was 8.9 ug/L at EFF-001. |
The average monthly result is based on one sampling event, on 2/18/21. Follow-up sampling was not immediately conducted because discharge to the river concluded for the month of February on 2/20/21 and the City did not became aware of the violation until receipt of the lab report, on 3/5/21. Copper was sampled during effluent discharge on 3/12/21 and the result was 4.1 µg/L, in compliance with the NPDES permit limit.
The long term solution is that WTRP is being upgraded to an MBR plant, which will provide more reliable pollutant removal. Also, moving forward, the City will request 'rush analysis' on effluent copper samples in order to become aware of potential violations in a more timely manner. |
Violation |
B |
eSMR |
| 1088164 |
02/06/2021 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 20 mg/L and reported value was 24.5 mg/L at EFF-001. |
The result is in compliance with the Cease and Desist Order Interim TSS AWEL of 45 mg/L. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades will ensure consistent removal of TSS and full compliance with the NPDES Permit. |
Violation |
B |
eSMR |
| 1108114 |
02/02/2021 |
OEV |
Total Coliform 5-Sample Median limit is 23.0 MPN/100 mL and reported value was 46.0 MPN/100 mL at EFF-001. |
|
Violation |
B |
Report |
| 1086900 |
01/31/2021 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 540 MPN/100 mL at EFF-001. |
The violation likely occurred due to a clogged chlorine disinfectant feed line. The line has since been cleared and flushed. Follow-up lab results from 2/1/21 indicate total coliform levels returned to <1.8 MPN/ 100mL. Moving forward, NaCl is no longer delivered on its own; we are now using delivery water to reduce the potential for precipitative NaCl buildup in the lines. |
Violation |
U |
eSMR |
| 1108108 |
01/31/2021 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average (Mean) limit is 15.0 mg/L and reported value was 24.8 mg/L at EFF-001. |
|
Violation |
B |
Report |
| 1108113 |
01/30/2021 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 20.0 mg/L and reported value was 24.8 mg/L at EFF-001. |
|
Violation |
B |
Report |
| 1072101 |
02/29/2020 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 15 mg/L and reported value was 19.3 mg/L at EFF-001. |
The result is in compliance with the Cease and Desist Order Interim TSS AMEL of 30 mg/L. The City is in compliance with the CDO schedule for upgrading the WWTRP; the upgrades will ensure consistent removal of BOD and full compliance with the NPDES Permit. |
Violation |
B |
eSMR |
|
Report displays most recent five years of violations. Refer to the Interactive Violation Report for more data.
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