CALIFORNIA STEEL INDUSTRIES, FONTANA
NPDES ID: CA0105449
S — SNC: Compliance schedule violation
The facility missed a deadline in its compliance schedule by more than 90 days.
This quarter: 4 effluent violations, 1 compliance schedule violation.
Violations
April 30, 2026
Solids, total suspended
33% over limit
Discharged 100 mg/L against a permitted limit of 75 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total recoverable
515% over limit
Discharged 0.72000003 mg/L against a permitted limit of 0.11700001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total recoverable
164% over limit
Discharged 0.037 mg/L against a permitted limit of 0.014 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Lead, total recoverable
1061% over limit
Discharged 0.065 mg/L against a permitted limit of 0.0056 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2026
Zinc, total recoverable
156% over limit
Discharged 0.30000001 mg/L against a permitted limit of 0.11700001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2026
Zinc, total recoverable
37% over limit
Discharged 0.16000001 mg/L against a permitted limit of 0.11700001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (5 months ago)
Last confirmed
September 15, 2026 (5 days ago)