| 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. |
| 1147749 |
05/12/2025 |
Unauthorized Discharge |
Per the May SMR: On May 12, 2025, approximately 240,000 gallons of secondary treated, disinfected wastewater was discharged to Islais Channel at Discharge Point No. EFF-002 (Quint Street Outfall). The discharge started at approximately 07:34 am and ended at approximately 08:04 am. The cause was a faulty bubbler level indicator at the Booster Pump Station and inability to automatically switch to a redundant level control using the Distributed Control System (DCS). |
Violation |
None |
Report |
SF-SE Water Pollution Control Plant, N-Point & Bayside |
392750 |
R2-2013-0029 |
N |
| 1147141 |
08/30/2025 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 1 Spill; Pump Station Failure - Controls caused 24129 gallons of sewage to spill from Manhole at 9th St x Avenue I to Drainage Conveyance System that discharges to surface water |
Violation |
None |
SSO |
Treasure Island Development Authority CS |
403298 |
2022-0103-DWQ |
N |
| 1144040 |
02/14/2025 |
CAT2 |
Chlorine, Total Residual Instantaneous Maximum limit is 0.0 mg/L and reported value was 2 mg/L at EFF-001B. |
Violation |
None |
Report |
SF-SE Water Pollution Control Plant, N-Point & Bayside |
392750 |
R2-2013-0029 |
N |
| 1144032 |
11/22/2024 |
Order Conditions |
Per the November SMR: On November 22, pumping at North Point Wet Weather Facility (NPF) intermittently dropped to less than 135 MGD due to a pump failure caused by a variable frequency drive fault. SFPUC Operations worked with a contractor to reset the pump, which was out of service for approximately 20 minutes due to the need for control program sequencing. SFPUC anticipates that this issue will be resolved in January 2025, when the control system is replaced. The effect of this issue on the average pumping rate and the volume of CSD was small: the average pumping rate at NPF during Bayside CSDs was approximately 134 MGD and the increase in CSD volume was less than 0.93 MG or less than 0.16% of the Bayside CSD volume. |
Violation |
None |
Report |
SF-SE Water Pollution Control Plant, N-Point & Bayside |
392750 |
R2-2013-0029 |
N |
| 1141596 |
03/23/2025 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 1 Spill; Debris-Rags,Debris-wipes/Non-disposables caused 3600 gallons of sewage to spill from Manhole at Treat Blvd/San Miguel/Ygnacio Woods to Drainage Conveyance System that discharges to surface water |
Violation |
None |
SSO |
Concord City CS |
299830 |
2022-0103-DWQ |
N |
| 1140607 |
01/29/2025 |
CAT2 |
Chlorine, Total Residual 1-Hour Average (Mean) limit is 0.065 mg/L and reported value was 0.168 mg/L at EFF-001. |
Violation |
N |
eSMR |
Napa Sanitation District WWTP (Soscol Water Recycling Facility) |
446586 |
R2-2022-0003 |
N |
| 1138316 |
11/10/2024 |
Deficient Monitoring |
The NPDES permit requires WQCP to monitor pH at the E-001 site. Since June 1, 2023, WQCP has implemented real-time pH monitoring at E-001 using a HACH Digital pH sensor (model #: DPD1P1), with data transmitted to SCADA via the HACH controller (model#: SC200). In November 2024, technical issues with the controller caused data transmission failures on 7 days, resulting in 3 days with data gaps more than 60 minutes and the total time of data gaps during the calendar month more than 7 hours and 26 minutes. These conditions are specified for compliance determinations using a continuous monitor (Order No. R2-2019-0021, Table 4, footnote 1). Despite the missing data, the effluent pH remained within the compliance range of 6-9 s.u., as confirmed by the upstream pH analyzer, located after the aeration basins and before the secondary clarifiers. The upstream analyzer typically records pH values similar to those measured at E-001 and demonstrated consistent compliance within the 6.0¿9.0 range throughout the month. A thorough investigation was conducted by the Lead Plant Mechanic Kenneth de Leon and Lead Operator Ryan Estrada. Hardware, communication, environmental, and SCADA-related causes were ruled out (see table below). However, software glitches or bugs remain a possible, undetermined factor. It was observed that when the analyzer sent a warning signal to the controller, data transmission between the controller and SCADA is paused. |
Violation |
N |
eSMR |
South San Francisco-San Bruno WQCP |
432955 |
R2-2019-0021 |
N |
|
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