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. |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
Violation |
N |
Report |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
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 |
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 |
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 |
1124507 |
01/09/2024 |
CAT2 |
Chlorine, Total Residual Instantaneous Maximum limit is 0.1 mg/L and reported value was 0.16 mg/L at EFF-001. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1124509 |
01/11/2024 |
CAT2 |
Chlorine, Total Residual Instantaneous Maximum limit is 0.1 mg/L and reported value was .12 mg/L. |
Violation |
N |
eSMR |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
N |
1125298 |
02/29/2024 |
CAT1 |
Nitrate, Total (as N) Monthly Average (Mean) limit is 10 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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
1123370 |
10/12/2023 |
Surface Water |
Discharge of waste that caused concentrations of un-ionized ammonia to exceed 0.025 mg/L (as nitrogen) |
Violation |
N |
Report |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
1123548 |
12/30/2023 |
CAT1 |
Nitrate, Total (as NO3) Monthly Mean limit is 10 % and reported value was 12 % at EFF-001. |
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 |
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 |
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 |
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 |
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 |
1124506 |
01/31/2024 |
CAT1 |
Nitrate, Total (as N) Monthly Average (Mean) limit is 10 mg/L and reported value was 15 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 |
1122311 |
10/29/2023 |
OEV |
pH Daily Maximum limit is 8.3 SU and reported value was 8.38 SU at EFF-001. |
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 |
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 |
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 |
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 |
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 |
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 |
Violation |
N |
Report |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
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 |
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 |
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 |
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 |
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 |
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 |
1124514 |
01/19/2024 |
CAT2 |
Chlorine, Total Residual Instantaneous Maximum limit is 0.1 mg/L and reported value was 0.16 mg/L at EFF-001. |
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 |
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 |
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 |
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 |
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 |
1123371 |
10/12/2023 |
Other Codes |
Discharge of effluent to 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 |
Violation |
N |
Report |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
1123374 |
10/12/2023 |
Order Conditions |
Discharge of treated wastewater at an unapproved location |
Violation |
N |
Report |
San Luis Obispo WWTP |
399576 |
R3-2014-0033 |
Y |
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 |
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 |
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 |
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 |
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 |
1124511 |
01/16/2024 |
CAT2 |
Chlorine, Total Residual Instantaneous Maximum limit is 0.1 mg/L and reported value was .15 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 |
Report defaults to display violations within the last year. Click here to see last five years of violations. Refer to the Interactive Violation Report for more data.
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