ST. HELENA WWTRP
NPDES ID: CA0038016
S — SNC: Compliance schedule violation
The facility missed a deadline in its compliance schedule by more than 90 days.
This quarter: 1 compliance schedule violation.
Violations
August 31, 2025
Heptachlor
0% over limit
Discharged 0.0000031 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Cadmium, total recoverable
0% over limit
Discharged 0.00005 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Bis[2-chloroisopropyl] ether
0% over limit
Discharged 0.00014 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
1,2,3,7,8-Pentachlorodibenzo-p-dioxin
0% over limit
Discharged 1e-8 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
.beta.-Endosulfan
0% over limit
Discharged 0.0000042 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Toluene
0% over limit
Discharged 0.00019 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
First flagged
April 14, 2026 (5 months ago)
Last confirmed
September 15, 2026 (5 days ago)