Violation ID |
Occurrence Date |
Violation Type |
Violation Description(-) |
Violation Status |
Priority |
Source |
Facility Name |
Violated Reg. Meas. ID |
Violated Reg. Meas. Order No. |
Linked to Enf. |
1136023 |
11/02/2024 |
Late Report |
Quarterly SMR ( PRETRPT ) (Pretreatment Mon Rpt Quarterly) report for Q3 2024 (2829692) was due on 01-NOV-24 |
Violation |
None |
Report |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1136008 |
11/02/2024 |
Late Report |
Quarterly SMR ( PRETRPT ) (Pretreatment Mon Rpt Quarterly) report for Q3 2024 (2910117) was due on 01-NOV-24 |
Violation |
None |
Report |
San Luis Obispo WWTP |
456704 |
R3-2024-0001 |
N |
1136007 |
11/02/2024 |
Late Report |
Quarterly SMR ( MONNPDES ) (NPDES Mon Rpt Quarterly) report for Q3 2024 (2910119) was due on 01-NOV-24 |
Violation |
None |
Report |
San Luis Obispo WWTP |
456704 |
R3-2024-0001 |
N |
1135201 |
09/11/2024 |
Deficient Monitoring |
The Water Quality Laboratory used method Standard Methods 9223 for Total Coliform Monitoring through 9/12/24. Standard Methods 9223 is not approved to measure Total Coliforms in wastewater but is approved to measure coliforms in Title 22 Recycled water. All analyses conducted through 9/12/24 are reported at the monitoring location EFF-002. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
456704 |
R3-2024-0001 |
N |
1135200 |
09/04/2024 |
Deficient Monitoring |
The Water Quality Laboratory used method Standard Methods 9223 for Total Coliform Monitoring through 9/12/24. Standard Methods 9223 is not approved to measure Total Coliforms in wastewater but is approved to measure coliforms in Title 22 Recycled water. All analyses conducted through 9/12/24 are reported at the monitoring location EFF-002. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
456704 |
R3-2024-0001 |
N |
1135199 |
09/03/2024 |
Deficient Monitoring |
The Water Quality Laboratory used method Standard Methods 9223 for Total Coliform Monitoring through 9/12/24. Standard Methods 9223 is not approved to measure Total Coliforms in wastewater but is approved to measure coliforms in Title 22 Recycled water. All analyses conducted through 9/12/24 are reported at the monitoring location EFF-002. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
456704 |
R3-2024-0001 |
N |
1135198 |
09/12/2024 |
Deficient Monitoring |
The Water Quality Laboratory used method Standard Methods 9223 for Total Coliform Monitoring through 9/12/24. Standard Methods 9223 is not approved to measure Total Coliforms in wastewater but is approved to measure coliforms in Title 22 Recycled water. All analyses conducted through 9/12/24 are reported at the monitoring location EFF-002. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
456704 |
R3-2024-0001 |
N |
1135197 |
09/09/2024 |
Deficient Monitoring |
The Water Quality Laboratory used method Standard Methods 9223 for Total Coliform Monitoring through 9/12/24. Standard Methods 9223 is not approved to measure Total Coliforms in wastewater but is approved to measure coliforms in Title 22 Recycled water. All analyses conducted through 9/12/24 are reported at the monitoring location EFF-002. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
456704 |
R3-2024-0001 |
N |
1135196 |
09/06/2024 |
Deficient Monitoring |
The Water Quality Laboratory used method Standard Methods 9223 for Total Coliform Monitoring through 9/12/24. Standard Methods 9223 is not approved to measure Total Coliforms in wastewater but is approved to measure coliforms in Title 22 Recycled water. All analyses conducted through 9/12/24 are reported at the monitoring location EFF-002. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
456704 |
R3-2024-0001 |
N |
1135195 |
09/05/2024 |
Deficient Monitoring |
The Water Quality Laboratory used method Standard Methods 9223 for Total Coliform Monitoring through 9/12/24. Standard Methods 9223 is not approved to measure Total Coliforms in wastewater but is approved to measure coliforms in Title 22 Recycled water. All analyses conducted through 9/12/24 are reported at the monitoring location EFF-002. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
456704 |
R3-2024-0001 |
N |
1135194 |
09/10/2024 |
Deficient Monitoring |
The Water Quality Laboratory used method Standard Methods 9223 for Total Coliform Monitoring through 9/12/24. Standard Methods 9223 is not approved to measure Total Coliforms in wastewater but is approved to measure coliforms in Title 22 Recycled water. All analyses conducted through 9/12/24 are reported at the monitoring location EFF-002. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
456704 |
R3-2024-0001 |
N |
1135093 |
09/12/2024 |
Order Conditions |
Effluent-002 Total Coliform Daily Max 25.6 MPN/100 mL on 9/12/24. The elevated results were all analyzed using Standard Methods 9223. Standard Methods 9223 is prone to a positive test interference from non-coliform heterotrophic background bacteria. All results have been <1.8 MPN/ 100mL since switching to the analytical method SM 9221 (Multiple Tube Fermentation). |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
456704 |
R3-2024-0001 |
N |
1135092 |
09/03/2024 |
Surface Water |
RSW-005 was 26 true color units greater than RSW-004. The SLO WRRF upgrade, known as SLO Water+, is nearing completion; however, the facility can only operate on its full its biological treatment process until the completion of the Liquids Phase Two. With two of four bioreactors online, hydraulic retention time is limited. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
456704 |
R3-2024-0001 |
N |
1135091 |
09/19/2024 |
Order Conditions |
Effluent-002 7 Sample Median 3.1 MPN/100 mL on 9/19/24. The elevated results were all analyzed using Standard Methods 9223. Standard Methods 9223 is prone to a positive test interference from non-coliform heterotrophic background bacteria. All results have been <1.8 MPN/ 100mL since switching to the analytical method SM 9221 (Multiple Tube Fermentation). |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
456704 |
R3-2024-0001 |
N |
1135090 |
09/13/2024 |
Order Conditions |
Effluent-002 Total Coliform Daily Max 65.0 MPN/100 mL on 9/13/24. The elevated results were all analyzed using Standard Methods 9223. Standard Methods 9223 is prone to a positive test interference from non-coliform heterotrophic background bacteria. All results have been <1.8 MPN/ 100mL since switching to the analytical method SM 9221 (Multiple Tube Fermentation). |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
456704 |
R3-2024-0001 |
N |
1135089 |
09/02/2024 |
Deficient Monitoring |
The Water Quality Laboratory used method Standard Methods 9223 for Total Coliform Monitoring through 9/12/24. Standard Methods 9223 is not approved to measure Total Coliforms in wastewater but is approved to measure coliforms in Title 22 Recycled water. All analyses conducted through 9/12/24 are reported at the monitoring location EFF-002. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
456704 |
R3-2024-0001 |
N |
1134600 |
07/02/2024 |
Surface Water |
The annual running mean for RSW-005 sodium was 70 mg/L |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1133723 |
07/23/2024 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 1 Spill; Debris from Lateral, Root Intrusion caused 911 gallons of sewage to spill from Lateral Clean Out (Private) at 2015 Monterey St to Paved Surface, Surface Water, Unpaved Surface |
Violation |
None |
SSO |
San Luis Obispo CS |
299937 |
2022-0103-DWQ |
N |
1132902 |
08/29/2024 |
Surface Water |
Increase of 29 color units from RSW-004 and RSW-005. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1132901 |
08/22/2024 |
Surface Water |
Increase of 24color units from RSW-004 and RSW-005. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1132900 |
08/06/2024 |
Surface Water |
Increase of 16 color units from RSW-004 and RSW-005. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1131328 |
07/31/2024 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 10.0 mg/L and reported value was 15.0 mg/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1131327 |
07/31/2024 |
Surface Water |
Increase of 19 color units from RSW-004 and RSW-005. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1131326 |
07/17/2024 |
Surface Water |
Increase of 19 color units from RSW-004 and RSW-005. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1131325 |
07/02/2024 |
Surface Water |
Increase of 19 color units from RSW-004 and RSW-005. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1130042 |
04/02/2024 |
Surface Water |
Annual running mean 72mg/L |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1130041 |
06/19/2024 |
Surface Water |
RSW-005 was 16 true color units greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1130040 |
06/30/2024 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 10.0 mg/L and reported value was 14.0 mg/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1128946 |
05/31/2024 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 10.0 mg/L and reported value was 14.0 mg/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1128176 |
04/30/2024 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 10.0 mg/L and reported value was 15.0 mg/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1126356 |
01/02/2024 |
Surface Water |
RSW-005 annual running mean for sodium was 79 mg/L. WRRF Influent sodium was 110 mg/L and EFF-001 was 101 mg/L on 1/2/2024. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1126355 |
03/31/2024 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 10 mg/L and reported value was 11 mg/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1125298 |
02/29/2024 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 10.0 mg/L and reported value was 16.5 mg/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1124513 |
01/10/2024 |
Surface Water |
RSW-004 11 Color Units, RSW-005 27 Color units. The upgraded liquids treatment process does not use sodium hypochlorite for disinfection. True color-causing substances, like humic acids, are not removed by the membrane filtration unit. Elevated EFF-001 color impacted receiving water color quality at RSW-005. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1124512 |
01/30/2024 |
Surface Water |
RSW-004 13 Color Units, RSW-005 29 Color units. The upgraded liquids treatment process does not use sodium hypochlorite for disinfection. True color-causing substances, like humic acids, are not removed by the membrane filtration unit. Elevated EFF-001 color impacted receiving water color quality at RSW-005. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1124510 |
01/18/2024 |
Surface Water |
RSW-004 8 Color Units, RSW-005 30 Color units. The upgraded liquids treatment process does not use sodium hypochlorite for disinfection. True color-causing substances, like humic acids, are not removed by the membrane filtration unit. Elevated EFF-001 color impacted receiving water color quality at RSW-005. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1124508 |
01/18/2024 |
Surface Water |
RSW-004 Temp 13.3 Deg C, RSW-005 18.5 Deg C, 10 deg F difference not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1124506 |
01/31/2024 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 10.0 mg/L and reported value was 15.0 mg/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1124505 |
01/10/2024 |
Surface Water |
RSW-004 Temp 12.8 Deg C, RSW-005 17.6 Deg C, 9 deg F difference Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1124504 |
01/02/2024 |
Surface Water |
RSW-004 Temp 13.7 Deg C, RSW-005 17.8 Deg C, 7 deg F difference Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1124503 |
01/30/2024 |
Surface Water |
RSW-004 Temp 13.7 Deg C, RSW-005 17.4 Deg C, 7 deg F difference Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1124274 |
02/02/2024 |
Late Report |
Annual SMR ( SLUDGE ) (Biosolids (Sludge) Tech Rpt) report for 2023 (2673352) was due on 01-FEB-24 |
Violation |
None |
Report |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123562 |
12/06/2023 |
Surface Water |
Color The upgraded liquids treatment process does not use sodium hypochlorite for disinfection. True color-causing substances, like humic acids, are not removed by the membrane filtration unit. Elevated EFF-001 color impacted receiving water color quality at RSW-005. 12/6/23 RSW-005 37 color units, 29 color units greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123561 |
12/01/2023 |
Surface Water |
Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/1/23 RSW-005 22.1 °C, 12°F greater than RSW-004. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123560 |
12/14/2023 |
Surface Water |
Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/14/23 RSW-005 21.7 °C, 13°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123559 |
12/07/2023 |
Surface Water |
Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/7/23 RSW-005 22.1 °C, 12°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123558 |
12/06/2023 |
Surface Water |
Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/6/23 RSW-005 22.1 °C, 12°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123557 |
12/02/2023 |
Surface Water |
Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/2/23 RSW-005 22.3 °C, 13°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123556 |
12/09/2023 |
Surface Water |
Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/9/23 RSW-005 20.8 °C, 12°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123555 |
12/03/2023 |
Surface Water |
Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/3/23 RSW-005 21.9 °C, 12°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123554 |
12/08/2023 |
Surface Water |
Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/8/23 RSW-005 21.6 °C, 11°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123553 |
12/16/2023 |
Surface Water |
Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/16/23 RSW-005 21.2 °C, 14°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123552 |
12/15/2023 |
Surface Water |
Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/15/23 RSW-005 21.7 °C, 13°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123551 |
12/13/2023 |
Deficient Monitoring |
Color The upgraded liquids treatment process does not use sodium hypochlorite for disinfection. True color-causing substances, like humic acids, are not removed by the membrane filtration unit. Elevated EFF-001 color impacted receiving water color quality at RSW-005. 12/13/23 RSW-005 39 color units, 31 color units greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123550 |
12/17/2023 |
Surface Water |
Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/17/23 RSW-005 21.1 °C, 12°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123549 |
12/13/2023 |
Surface Water |
Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/13/23 RSW-005 21.9 °C, 14°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123548 |
12/31/2023 |
CAT1 |
Nitrate, Total (as NO3) Monthly Average limit is 10.0 mg/L and reported value was 12.0 mg/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123547 |
12/12/2023 |
Surface Water |
Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/12/23 RSW-005 21.6 °C, 12°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123546 |
12/11/2023 |
Surface Water |
Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/11/23 RSW-005 22.0. °C, 13°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123545 |
12/05/2023 |
Surface Water |
Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/5/23 RSW-005 22.9 °C, 12°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123544 |
12/10/2023 |
Surface Water |
Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/10/23 RSW-005 22.6 °C, 14°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123543 |
12/04/2023 |
Surface Water |
Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/4/23 RSW-005 22.1 °C, 12°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123542 |
12/28/2023 |
Surface Water |
Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/28/23 RSW-005 19.4 °C, 8°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123541 |
12/20/2023 |
Surface Water |
Color The upgraded liquids treatment process does not use sodium hypochlorite for disinfection. True color-causing substances, like humic acids, are not removed by the membrane filtration unit. Elevated EFF-001 color impacted receiving water color quality at RSW-005. 12/20/23 RSW-005 35 color units, 25 color units greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123374 |
10/12/2023 |
Order Conditions |
Discharge of treated wastewater at an unapproved location in violation of permit's Discharge Prohibition III.A. |
Violation |
N |
Report |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1123373 |
10/12/2023 |
Surface Water |
Discharge that increased the concentration of ammonia, an inorganic chemical, and adversely affected warm and cold fresh water habitats, migration, and spawning, reproduction, and development in violation of permit's Receiving Water Limitation V.A.9. |
Violation |
N |
Report |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1123371 |
10/12/2023 |
Order Conditions |
Discharge of effluent that altered the quality of its waters to a degree that unreasonably affected warm and cold fresh water habitats, migration, and spawning, reproduction, and development in violation of permit's Standard Provision II.B.1. |
Violation |
N |
Report |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1123370 |
10/12/2023 |
Surface Water |
Discharge of waste that caused concentrations of un-ionized ammonia to exceed 0.025 mg/L (as nitrogen) in San Luis Obispo Creek in violation of permit's Receiving Water Limitation V.A.15. |
Violation |
N |
Report |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1123369 |
10/12/2023 |
Surface Water |
Discharge of effluent containing toxic substances in concentrations toxic to aquatic life that produced detrimental physiological responses in steelhead trout in violation of permit's Receiving Water Limitation V.A.14. |
Violation |
N |
Report |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1123107 |
11/07/2023 |
Surface Water |
Water The upgraded liquids treatment process does not use sodium hypochlorite for disinfection. True color-causing substances, like humic acids, are not removed by the membrane filtration unit. Elevated EFF-001 color impacted receiving water color quality at RSW-005. Result for color analysis: 36 color units, 28 color units greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123106 |
11/25/2023 |
Surface Water |
Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 22.0 °C, 11°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123105 |
11/24/2023 |
Surface Water |
Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 21.5 °C, 10°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123104 |
11/22/2023 |
Surface Water |
Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 20.0 °C, 10°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123103 |
11/13/2023 |
Surface Water |
Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 23.0 °C, 15°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123102 |
11/29/2023 |
Surface Water |
Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 20.2 °C, 12°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123101 |
11/26/2023 |
Surface Water |
Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 21.2 °C, 11°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123100 |
11/20/2023 |
Surface Water |
Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 20.6 °C, 9°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123099 |
11/11/2023 |
Surface Water |
Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 19.3. °C, 10°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123098 |
11/23/2023 |
Surface Water |
Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 21.7 °C, 10°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123097 |
11/19/2023 |
Surface Water |
Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 20.6 °C, 8°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123096 |
11/12/2023 |
Surface Water |
Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 20.7 °C, 10°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123095 |
11/07/2023 |
Surface Water |
Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 23. °C, 11°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123094 |
11/15/2023 |
Surface Water |
Water The upgraded liquids treatment process does not use sodium hypochlorite for disinfection. True color-causing substances, like humic acids, are not removed by the membrane filtration unit. Elevated EFF-001 color impacted receiving water color quality at RSW-005. Result for color analysis: 41 color units, 33 color units greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123093 |
11/30/2023 |
Surface Water |
Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 22.1 °C, 10°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123092 |
11/28/2023 |
Surface Water |
Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 21.8 °C, 14°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123091 |
11/27/2023 |
Surface Water |
Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 21.5 °C, 14°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123090 |
11/09/2023 |
Surface Water |
Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 22.4 °C, 12°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123089 |
11/17/2023 |
Surface Water |
Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 24.0 °C, 14°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123088 |
11/16/2023 |
Surface Water |
Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 24.1 °C, 13°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123087 |
11/15/2023 |
Surface Water |
Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 22.7 °C, 14°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123086 |
11/14/2023 |
Surface Water |
Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 22.8. °C, 7°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123085 |
11/05/2023 |
Surface Water |
Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 23.4 °C, 10°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123084 |
11/04/2023 |
Surface Water |
Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 18.2 °C, 6°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123083 |
11/08/2023 |
Surface Water |
Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 22.8 °C, 7°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1123082 |
11/06/2023 |
Surface Water |
Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 23.9 °C, 11°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1122851 |
11/01/2023 |
Surface Water |
The upgraded liquids treatment process does not use sodium hypochlorite for disinfection. True color-causing substances, like humic acids, are not removed by the membrane filtration unit. Elevated EFF-001 color impacted receiving water color quality at RSW-005. Result for color analysis: 37 color units, 29 color units greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1122850 |
11/01/2023 |
Surface Water |
Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 20.9 °C, 13°F greater than RSW-004 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1122314 |
10/12/2023 |
Surface Water |
RSW-005 unionized ammonia as N was 1.42 mg/L on 10/12/23 at 10:00. Effluent - 001 ammonia as N had a reported value of 35 mg/L on 10/12/23 at 10:13. On 10/14/23, RSW-005 unionized ammonia as N was .304 mg/L at 09:25. On 10/15/23, RSW-005 unionized ammonia as N was 0.0124 mg/L at 09:21. Elevated receiving water unionized ammonia levels were due to high effluent ammonia being discharged. High-effluent ammonia was traced back to high solids loading and oxygen demand on the bioreactor. Solids loading was due to construction sequencing, loss of the dissolved air flotation thickener, and solids being unable to be removed from the system. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1122313 |
10/04/2023 |
Surface Water |
RSW-005 exceeded RSW-004 true color units on 10/4/23 (19 units), 10/12/23 (28 color units), 10/18/23 (21 color units), and 10/25/23 (27 color units). |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1122312 |
10/16/2023 |
Surface Water |
Receiving surface water temperature exceeded 22.5 degrees C at 14:40 on 10/16/23. EFF-001 temperature was 22.5 degress C at 10:53. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1122311 |
10/29/2023 |
OEV |
pH Instantaneous Maximum limit is 8.3 SU and reported value was 8.4 SU at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1122310 |
10/25/2023 |
Surface Water |
Receiving surface water temperature exceeded 22.5 degrees C at 13:41 on 10/16/23, with a recorded temperature of 23.3 degrees C. EFF-001 temperature was 24.5 degrees C at 13:53. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1121454 |
09/20/2023 |
Surface Water |
RSW-005, exceeded 22.5 Deg C, sample taken at 0948 9/20/23 had a recorded temperature fo 23.7 Deg C. Effluent temperature sampled at 1003 9/20/23 had a temperature of 25.4 Deg C. Operations staff is currently working through programming of the new facility and trying to balance effluent pH compliance with receiving water temperature limits. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1121453 |
09/27/2023 |
Surface Water |
Unionized ammonia at RSW-005 was 0.0500 mg/L as N on 9/27/23 14:16. All aeration blowers were in use and unable to sustain an elevated dissolved oxygen level in the bioreactor's aeration zone. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1121452 |
09/06/2023 |
Surface Water |
The upgraded liquids treatment process does not use sodium hypochlorite for disinfection. True color-causing substances, like humic acids, are not removed by the membrane filtration unit. Elevated EFF-001 color impacted receiving water color quality at RSW-005 |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1120441 |
08/17/2023 |
OEV |
pH Instantaneous Maximum limit is 8.3 SU and reported value was 8.31 SU at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1120440 |
08/04/2023 |
OEV |
pH Instantaneous Maximum limit is 8.3 SU and reported value was 8.40 SU at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1119230 |
08/02/2023 |
Late Report |
Monthly SMR ( MONNPDES ) (NPDES Mon Rpt Monthly) report for June 2023 (2705561) was due on 01-AUG-23 |
Violation |
None |
Report |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1116495 |
05/01/2023 |
Deficient Reporting |
Q1 Pretreatment Report was not submitted by the 5/1/2023 deadline. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1115625 |
04/19/2023 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 3. Grease Deposition (FOG);The mainline blocked of with grease. caused 3.0 gallons of sewage to spill from Manhole;The spill appeared out of the manhole K09-22. at 1312 Johnson to Separate Storm Drain;A small amount of the spill reached San Luis Creek.. No surface water body affected. |
Violation |
N |
SSO |
San Luis Obispo CS |
299937 |
2022-0103-DWQ |
N |
1112904 |
10/04/2022 |
CAT2 |
Dichlorobromomethane Daily Maximum limit is 1.0 ug/L and reported value was 17.8 ug/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1112903 |
10/04/2022 |
CAT2 |
Dibromochloromethane Daily Maximum limit is 1.0 ug/L and reported value was 2.1 ug/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1112902 |
10/31/2022 |
CAT2 |
Dichlorobromomethane Monthly Average (Mean) limit is 0.56 ug/L and reported value was 17.8 ug/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1112901 |
10/31/2022 |
CAT2 |
Dibromochloromethane Monthly Average limit is 0.40 ug/L and reported value was 2.1 ug/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1112441 |
12/03/2022 |
CAT2 |
Chlorine, Total Residual Daily Maximum limit is 0.1 mg/L and reported value was 0.76 mg/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1111653 |
12/31/2022 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 1. Grease Deposition (FOG);We believe the spill was caused by grease (FOG) and cleaning wipes. caused 4250.0 gallons of sewage to spill from Manhole;The spill came out of Manhole ID K09-20. at 1043 Higuera St. to Separate Storm Drain;The spill entered San Luis Creek.. Surface water body affected (San Luis Creek). |
Violation |
N |
SSO |
San Luis Obispo CS |
299937 |
2022-0103-DWQ |
Y |
1111500 |
12/26/2022 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 1. Root Intrusion;The spill was caused by root intrusion into the city sewer main. caused 5.0 gallons of sewage to spill from Manhole;The Spill appeared out of manhole M07-1 in front of 2243 Santa Ynez. at 2243 Santa Ynez to Separate Storm Drain;The spill entered a separate storm drain.. Surface water body affected (San Luis Creek). |
Violation |
N |
SSO |
San Luis Obispo CS |
299937 |
2022-0103-DWQ |
N |
1111364 |
11/30/2022 |
CAT1 |
Nitrate, Total (as N) Monthly Average (Mean) limit is 42.6 mg/L and reported value was 43.2 mg/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1109903 |
05/31/2021 |
Enforcement Action |
[6 Violations noted here, and any subsequent nitrate violations that occur during the effect of the TSO] Failed to comply with interim effluent limit of 42.6 mg/L for nitrate in violation of TSO Requirement No. 1. Subjects discharger to mmps based on permit final effluent limit of 10 mg/L. See Violations 1091389, 1097917, 1102546, 1103059, 1104606, and 1105844. |
Violation |
None |
Report |
San Luis Obispo WWTP |
435710 |
R3-2019-0124 |
N |
1109883 |
10/05/2021 |
Enforcement Action |
[4 Violations noted here, and any subsequent THM violations that occur during the effect of the TSO] Failed to achieve compliance with permit final effluent limit for dichlorobromomethane by 3/31/2020 in violation of TSO Requirements No. 2 and No. 3. Subjects discharger to mmps based on permit final effluent limits. See Violations 1099144, 1099145, 1099146, and 1099147. |
Violation |
N |
Report |
San Luis Obispo WWTP |
435710 |
R3-2019-0124 |
N |
1109378 |
09/19/2022 |
Deficient Monitoring |
Ammonia as N has a minimum sampling frequency of once per week. Three samples were taken for the month of September, no sample was taken the week of 9/19/22. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1107172 |
08/15/2022 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 1. Operator Error;Souza construction was working on Broad x Ramona and hit a 10" water main. The discharge from the water main break entered the sewer system and caused our system to back up. caused 103250.0 gallons of sewage to spill from Manhole;The spill appeared at manholes J07-1, J07-18, I06-50, and JO7-23. A map of the manhole/spill locations is attached to the report. at 64 Broad St. to Surface Water;The spill entered Old Garden Creek which flows to Avila Beach.. Surface water body affected (Old Garden Creek has been impacted by the spill.). |
Violation |
N |
SSO |
San Luis Obispo CS |
299937 |
2022-0103-DWQ |
Y |
1105844 |
05/31/2022 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 10 mg/L and reported value was 47.1 mg/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1104606 |
04/30/2022 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 10 mg/L and reported value was 45.9 mg/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1103329 |
04/24/2022 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 1. Debris-General;The spill was caused by grit in the City main. caused 46.0 gallons of sewage to spill from Manhole;Spill came out of manhole k11-59 at 2160 Santa Barbra St. to Drainage Channel. Surface water body affected (San Luis Creek). |
Violation |
N |
SSO |
San Luis Obispo CS |
299937 |
2022-0103-DWQ |
N |
1103059 |
03/31/2022 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 10 mg/L and reported value was 46.0 mg/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1102546 |
02/28/2022 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 10 mg/L and reported value was 46.1 mg/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1102545 |
02/28/2022 |
Deficient Monitoring |
Eff-001 was not sampled for Oil and Grease in February 2022. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1100636 |
02/02/2022 |
Late Report |
Annual SMR ( SLUDGE ) (Biosolids (Sludge) Tech Rpt) report for 2021 (2416393) was due on 01-FEB-22 |
Violation |
None |
Report |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1099147 |
10/31/2021 |
CAT2 |
Dichlorobromomethane Monthly Average limit is 0.56 ug/L and reported value was 10.8 ug/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1099146 |
10/05/2021 |
CAT2 |
Dibromochloromethane Daily Maximum limit is 1.0 ug/L and reported value was 1.2 ug/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1099145 |
10/31/2021 |
CAT2 |
Dibromochloromethane Monthly Average limit is 0.4 ug/L and reported value was 1.2 ug/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1099144 |
10/05/2021 |
CAT2 |
Dichlorobromomethane Daily Maximum limit is 1.0 ug/L and reported value was 10.8 ug/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1097917 |
11/30/2021 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 10 mg/L and reported value was 43.5 mg/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1095480 |
10/19/2021 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 1. Pipe Structural Problem/Failure;NA caused 175.0 gallons of sewage to spill from Gravity Mainline;NA at 1023 Chorro to Beach;Surface Water;NA. Surface water body affected (San Luis Obispo creek). |
Violation |
N |
SSO |
San Luis Obispo CS |
299937 |
2022-0103-DWQ |
N |
1091393 |
10/14/2020 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 1600 MPN/100 mL at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1091392 |
10/14/2020 |
OEV |
Total Coliform Not to exceed a specific limit more than once within any 30-day period. limit is 23 MPN/100 mL and reported value was 1600 MPN/100 mL at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1091389 |
05/31/2021 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 10 mg/L and reported value was 43.7 mg/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1091282 |
06/22/2021 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 1. Root Intrusion caused 634 gallons of sewage to spill from Lateral Clean Out (Private);privet lateral on property at 505 Princton to Separate Storm Drain;Street/Curb and Gutter;Unpaved surface;cities storm drain system. Surface water body affected (Twin Ridge Creek). |
Violation |
N |
SSO |
San Luis Obispo CS |
299937 |
2022-0103-DWQ |
N |
1090895 |
06/06/2021 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 1. Debris-General caused 4050.0 gallons of sewage to spill from Lateral Clean Out (Private);Manhole;A second appearance point was at the private address cleanout 3560 Sacramento drive in San Luis Obispo ca. at 3560 Sacramento to Drainage Channel. Surface water body affected (Acacia Creek). |
Violation |
N |
SSO |
San Luis Obispo CS |
299937 |
2022-0103-DWQ |
N |
1087698 |
03/17/2021 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 1. Grease Deposition (FOG) caused 2930.0 gallons of sewage to spill from Manhole;Spill appearance point is a manhole on the San Luis Creek embankment. at 52 Los Palos to Surface Water;Unpaved surface. Surface water body affected (San Luis Creek). |
Violation |
N |
SSO |
San Luis Obispo CS |
299937 |
2022-0103-DWQ |
N |
1086453 |
01/16/2021 |
Surface Water |
RSW-004 pH 7.65 su 1/16/21 10:38 RSW-005 pH 7.10 su 1/16/21 10:35 Effluent 001 pH 6.92 su 1/16/21 10:39 Sodium hydroxide dose to the filter influent channel was set to 50 gallons per day. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1083584 |
10/31/2020 |
CAT2 |
Dichlorobromomethane Monthly Average limit is 0.56 ug/L and reported value was 2.5 ug/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1083583 |
10/06/2020 |
CAT2 |
Dichlorobromomethane Daily Maximum limit is 1.0 ug/L and reported value was 2.5 ug/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1082775 |
11/19/2020 |
Surface Water |
RSW-005 pH was below 7.00 su or was not within 0.5 su units of RSW-004 on 11/19/20 (pH 6.95 su, 6.96 su), 11/20/20 (6.86 su), 11/21/20 (6.86 su), 11/22/20 (6.92 su) , 11/23/20 (7.03 su), 11/28/20 (7.15 su). RSW-005 pH was |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1082774 |
11/01/2020 |
Surface Water |
Receiving water color units at RSW-005 exceeded the permit limit of not to exceed 15 units greater than RSW-004 beginning on 10/1/2020. The dates of exceedance include 11/1/2020, 11/2/2020, 10/3/2020, 11/3/2020, 11/4/2020, with compliance 11/6/2020. WRRF was still recovering from non-compliance of September 2020. The WRRF began to show signs of an upset with a loss of nitrification in the activated sludge unit beginning on 9/4/2020. Loss of nitrification was followed by a decease in all sludge quality throughout the activated sludge unit. On 10/1/ 2020, Cal Poly site coordinator informed WRRF staff that nitrification had been impacted with Cal Poly''s onsite algae ponds. RSW-005 color units, 11/1/2020 35 color units, 11/2/20 35 color units, |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1082228 |
10/13/2020 |
OEV |
Total Coliform Not to exceed a specific limit more than once within any 30-day period. limit is 23 MPN/100 mL and reported value was 540 MPN/100 mL at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1082227 |
10/01/2020 |
Surface Water |
Receiving water color units at RSW-005 exceeded the permit limit of not to exceed 15 units greater than RSW-004 beginning on 10/1/2020. The dates of exceedance include 10/1/2020, 10/2/2020, 10/3/2020, 10/11/2020, 10/23/2020, 10/25/2020, 10/26/2020, 10/27/2020, 10/28/2020, 10/29/2020, 10/30/2020 and 10/31/2020. WRRF was still recovering from non-compliance of September 2020. The WRRF began to show signs of an upset with a loss of nitrification in the activated sludge unit beginning on 9/4/2020. Loss of nitrification was followed by a decease in all sludge quality throughout the activated sludge unit. On 10/1/ 2020, Cal Poly site coordinator informed WRRF staff that nitrification had been impacted with Cal Poly''s onsite algae ponds. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1082226 |
10/01/2020 |
Surface Water |
Un-ionized ammonia as N, exceeded 0.025 mg/L as N on 10/1/2020, 10/2/2020, 10/3/2020, 10/2020, 10/21/2020, 10/22/20, 10/23/2020, 10/25/2020, and 10/26/2020. Compliance was achieved on 10/27/2020 with an RSW-005 un-ionized ammonia of 0.015 mg/L as N. WRRF was still recovering from non-compliance of September 2020. The WRRF began to show signs of an upset with a loss of nitrification in the activated sludge unit beginning on 9/4/2020. Loss of nitrification was followed by a decease in all ammonia oxidizing and nitrite oxidizing activity and sludge quality throughout the activated sludge unit. On 10/1/ 2020, Cal Poly site coordinator informed WRRF staff that nitrification had been impacted with Cal Poly''s onsite algae ponds |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1082225 |
10/06/2020 |
Surface Water |
RSW-004 pH at 15:12 10/6/2020 was 7.68 su. RSW-005 pH at 15:06 10/6/2020 was 7.01 su. The pH value was depressed 0.67 su. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1082224 |
10/13/2020 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 540 MPN/100 mL at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1080898 |
09/16/2020 |
Surface Water |
Violation lasted from 9/16/20 through 9/30/20. Color units at RSW-005 exceeded 15 color units at RSW-004 daily. RSW-005 color ranged from 33 color units to 42 color units with a daily average of 38 color units. RSW-004 color ranged from 5 color units to 8 color units, with a daily average of 7 color units. WRRF suffered upset that began with loss of nitrification on 9/9/20 and accompanied by elevated clarifier turbidity and elevated clarifier total suspended solids. On 10/1/2020, Cal Poly site coordinator informed WRRF staff that nitrification had been impacted in September with their onsite algae ponds. Cal Poly''s wastewater program treats primary clarifier effluent independently of any other WRRF process. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1080897 |
09/23/2020 |
Surface Water |
RSW-005 pH 6.82 su on 9/23/20 compliance on 9/24/20 ph 7.17 su Sodium bisulfite pump at high stroke volume to ensure dechlorination. Chlorine dosing at 1276 pounds per day on 9/23/20 to meet all disinfection permit limits. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1080896 |
09/11/2020 |
Surface Water |
Violation lasted from 9/11/20 through 9/30/20. Un-ionized ammonia at RSW-005 exceeded 0.0250 mg/L un-ionized ammonia as N. RSW-005 un-ionized ammonia as N ranged from 0.13 mg/L un-ionized ammonia as N (9/13/2020) to 0.030 un-ionized ammonia as N ( 9/30/2020). RSW-004 un-ionized ammonia as N was non-detectable. WRRF suffered upset that began with loss of nitrification on 9/9/20 and accompanied by elevated clarifier turbidity and elevated clarifier total suspended solids. On 10/1/2020, Cal Poly site coordinator informed WRRF staff that nitrification had been impacted in September with their onsite algae ponds. Cal Poly''s wastewater program treats WRRF wastewater independent of any process changes. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1080385 |
10/17/2020 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 1. Debris-General caused 1879.0 gallons of sewage to spill from Lateral Clean Out (Private);Spill was observed coming from 3 private cleanouts near the properties connection to the city mainline. at 2015 Monterey to Building or Structure;Drainage Channel;Paved Surface;Separate Storm Drain;Surface Water;Unpaved surface;Majority of spill was captured in a water features pool near the clean out locations. This area was cleaned as part of the spill mitigation. Some overflow from the pool was able. Surface water body affected (San Luis Creek). |
Violation |
N |
SSO |
San Luis Obispo CS |
299937 |
2022-0103-DWQ |
N |
1079143 |
09/05/2020 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 1. Root Intrusion caused 3812.0 gallons of sewage to spill from Manhole;Spill appearance points were two manholes that were in the public right of way. at 4594 Wavertree to Paved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water. Surface water body affected (Islay Creek). |
Violation |
N |
SSO |
San Luis Obispo CS |
299937 |
2022-0103-DWQ |
N |
1075235 |
04/02/2020 |
Surface Water |
TDS at RSW-005 = 735 mg/L on 4/2/20. High influent chloride, sodium, and TDS coupled with plant process precipitate contributed to these violations |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1075234 |
04/02/2020 |
Surface Water |
Sodium at RSW-005 = 103 mg/L on 4/2/20. High influent chloride, sodium, and TDS coupled with plant process precipitate contributed to these violations |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1075195 |
04/02/2020 |
CAT2 |
Dibromochloromethane Daily Maximum limit is 1.0 ug/L and reported value was 5 ug/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1075194 |
04/30/2020 |
CAT2 |
Dichlorobromomethane Monthly Average (Mean) limit is .56 ug/L and reported value was 17 ug/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1075193 |
04/30/2020 |
CAT2 |
Dibromochloromethane Monthly Average (Mean) limit is .4 ug/L and reported value was 5 ug/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1075192 |
04/02/2020 |
CAT2 |
Dichlorobromomethane Daily Maximum limit is 1 ug/L and reported value was 17 ug/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1072141 |
02/26/2020 |
CAT2 |
Chlorine, Total Residual Other limit is 0 mg/L and reported value was .35 mg/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1072058 |
03/25/2020 |
Late Report |
City failed to complete and certify 3/8/20 SSO report in CIWQS by 3/24/20 in violation of the SSS WDR''s 15-calendar day reporting requirement. |
Violation |
N |
Report |
San Luis Obispo CS |
299937 |
2022-0103-DWQ |
Y |
1071610 |
03/08/2020 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 1. Root Intrusion caused 25104.0 gallons of sewage to spill from Inside Building or Structure;Lateral Clean Out (Private);1110 Orcutt Road - apartment complex''''''''s clean out and inside two units bathroom shower stalls. at 1110 Orcutt Road to Building or Structure;Paved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water;Unpaved surface. Surface water body affected (Alrita - Carla Creek). |
Violation |
N |
SSO |
San Luis Obispo CS |
299937 |
2022-0103-DWQ |
Y |
1071059 |
01/02/2020 |
Surface Water |
Sodium at RSW-005 had a concentration of 97 mg/L on 1/2/20, with an annual running average of 93 mg/L. Effluent 001 had a sodium concentration of 148 mg/L on 1/2/2020. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1071058 |
01/02/2020 |
Surface Water |
TDS at RSW-005 was 730 mg/L on 1/2/20, the annual average running mean was 683 mg/L TDS. Effluent 001 TDS on 1/2/20 was 820 mg/L. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1071000 |
02/21/2020 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 1. Other (specify below);Possible roots due to main being on a cleaning cycle caused 650.0 gallons of sewage to spill from Lateral Clean Out (Private);Back yard private lateral clean-out. Creek runs through property which was affected by the spill. at 3355 Broad to Surface Water;Unpaved surface. Surface water body affected (Rockview Creek). |
Violation |
N |
SSO |
San Luis Obispo CS |
299937 |
2022-0103-DWQ |
N |
1069966 |
12/04/2019 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 1600 MPN/100 mL at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1069819 |
01/20/2020 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 1. Other (specify below);Unknown caused 2142.0 gallons of sewage to spill from Lateral Clean Out (Private);Lower Lateral (Private);Spill was observed daylighting from 3 individual private clean outs that reside within a large dinning and hotel establishment. spill was seen coming from clean outs that are approximately 50ft. from the San Luis Creek. at 2015 Monterey Street to Paved Surface;Surface Water;Unpaved surface. Surface water body affected (San Luis Creek). |
Violation |
N |
SSO |
San Luis Obispo CS |
299937 |
2022-0103-DWQ |
N |
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