Per the February SMR: During the February 17, 2026 storm event, the SEP instantaneous influent flow did not reach 240 to 250 MGD prior to Islais Creek CSDs (Discharge Point Nos. 031-035). This was due to a loss of PG&E power at the Booster Pump Station (BPS), which feeds SEP final effluent to Discharge Point No. 001 (Pier 80 outfall). BPS lost power at approximately 7:40 a.m. due to a downed PG&E overhead power line. Staff quickly notified SFPUC Power Enterprise and PG&E for immediate resolution, shut down all loads to BPS, and opened (turned off) circuit breakers to protect BPS equipment. PG&E personnel arrived onsite to address the issue, and BPS regained power at approximately 11:30 a.m. SFPUC electricians closed the circuit breakers and worked with operators to start up BPS at 11:40 a.m. The SEP influent flow rate exceeded 240 MGD at approximately 12:00 p.m. The loss of the BPS pumps limited SEP to its wet weather secondary capacity of 150 MGD, which was discharged to Discharge Point No. 002 (Quint St outfall). Islais Creek CSDs started at about 11:09 a.m. During these Islais Creek discharges, the average SEP influent flow was approximately 230 MGD. The effect of the PG&E power loss was that an estimated 23 million gallons (MG) ? or an additional 12% ? was discharged through the Islais Creek CSD outfalls instead of undergoing wet weather primary treatment, disinfection, and discharge to Discharge Point No. 001.
Violation
None
Report
SF-SE Water Pollution Control Plant, N-Point & Bayside
392750
R2-2013-0029
N
1153297
12/26/2025
Order Conditions
Per the December SMR: On December 26, an estimated 7.45 million gallons of combined wastewater was discharged from the Division Street CSD Outfall (Discharge Point No. 026) when Channel Pump Station (CHS) was not yet pumping 80 MGD and the Southeast Plant influent was not at 250 MGD. This incident was caused by the operator on duty failing to follow proper procedures for maximizing treatment at SEP during wet weather. Specifically, the operator failed to appropriately increase CHS pumping to SEP as levels in the Channel Transport/Storage Box increased due to rain, which resulted in a CSD at the Division Street Outfall prior to SEP influent flow reaching 250 MGD. The CSD began at approximately 4:21 p.m.; the operator?s control shift ended sometime between 4:00 and 4:30 p.m. As a result of this issue, an estimated additional 0.22 million gallons (MG) or about 3.0% was discharged in at the Division Street Outfall.
Violation
None
Report
SF-SE Water Pollution Control Plant, N-Point & Bayside
392750
R2-2013-0029
N
1153296
12/24/2025
Order Conditions
Per the December SMR: On December 24, an instantaneous overcurrent was detected at a local substation, likely caused by the ingress of water and/or storm-related debris from that day?s wet weather event into the substation. This overcurrent condition ultimately tripped several upstream breakers, including SEP?s main power breaker. As a result, power to SEP was disrupted from about 3:30 a.m. until 10:00 a.m.; power to all plant processes was restored at approximately 1:15 p.m. SEP influent flow did not reach 250 MGD prior to combined sewer discharges (CSDs), which began at approximately 4:55 a.m. The effect of the power outage on CSD volume was an increase in the total volume discharged as CSDs in the Central Basin of about 115 MG, or 63%.
Violation
None
Report
SF-SE Water Pollution Control Plant, N-Point & Bayside
392750
R2-2013-0029
N
1153291
10/13/2025
Order Conditions
Per the October SMR: During the October 13 CSD event at the Mariposa outfall (Discharge Point No. CSD-029), the Mariposa Pump Station (MPS) did not achieve peak wet weather pumping capacity (10 MGD) when the Mariposa CSD started. The dry weather pumps automatically turned on and pumped throughout the CSD, but the wet weather pumps were incorrectly set for manual operation and were turned on three minutes after the CSD started (CSD start at 3:12pm, pumps on at 3:15pm). As a result, an estimated additional 0.01 million gallons (MG) or about 1.1% was discharged.
Violation
None
Report
SF-SE Water Pollution Control Plant, N-Point & Bayside
392750
R2-2013-0029
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.
Total Violations: 4
*Click the "(+/-) Violation Description" link to expand and contract the violation description.
Total Regulatory Measures linked to Related Parties: 2
The current report was generated with data as of: 05/20/2026
Regional Boards are in the process of entering backlogged data.
As a result, data may be incomplete.
