SIMI VALLEY WQCP
NPDES ID: CA0055221
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
This quarter: 4 effluent violations.
Violations
May 31, 2026
Sulfate, total [as SO4]
9% over limit
Discharged 272 mg/L against a permitted limit of 250 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Solids, total dissolved
4% over limit
Discharged 886 mg/L against a permitted limit of 850 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Cyanide, total [as CN]
27% over limit
Discharged 0.0052 mg/L against a permitted limit of 0.0041 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Sulfate, total [as SO4]
12% over limit
Discharged 281 mg/L against a permitted limit of 250 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Sulfate, total [as SO4]
40% over limit
Discharged 351 mg/L against a permitted limit of 250 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total dissolved
17% over limit
Discharged 992 mg/L against a permitted limit of 850 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (5 months ago)
Last confirmed
September 15, 2026 (6 days ago)