EL PASO DE ROBLES WWTP
NPDES ID: CA0047953
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
Violations
March 31, 2026
Copper, total recoverable
70% over limit
Discharged 0.0363 mg/L against a permitted limit of 0.0214 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total recoverable
313% over limit
Discharged 0.0363 mg/L against a permitted limit of 0.0088 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Copper, total recoverable
48% over limit
Discharged 0.013 mg/L against a permitted limit of 0.0088 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
1% over limit
Discharged 10.1 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Copper, total recoverable
56% over limit
Discharged 0.0137 mg/L against a permitted limit of 0.0088 mg/L (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Copper, total recoverable
28% over limit
Discharged 0.0113 mg/L against a permitted limit of 0.0088 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Copper, total recoverable
140% over limit
Discharged 0.0211 mg/L against a permitted limit of 0.0088 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Copper, total recoverable
56% over limit
Discharged 0.0137 mg/L against a permitted limit of 0.0088 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Copper, total recoverable
24% over limit
Discharged 0.0109 mg/L against a permitted limit of 0.0088 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
24% over limit
Discharged 0.0109 mg/L against a permitted limit of 0.0088 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)