SHASTA LAKE WWTF
NPDES ID: CA0079511
S — SNC: Compliance schedule violation
The facility missed a deadline in its compliance schedule by more than 90 days.
This quarter: 1 effluent violation.
Violations
May 31, 2026
Zinc, total recoverable
23% over limit
Discharged 0.0368 mg/L against a permitted limit of 0.03 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Zinc, total recoverable
39% over limit
Discharged 0.0418 mg/L against a permitted limit of 0.03 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Zinc, total recoverable
5% over limit
Discharged 0.0418 mg/L against a permitted limit of 0.04 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2025
Zinc, total recoverable
23% over limit
Discharged 0.037 mg/L against a permitted limit of 0.03 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Zinc, total recoverable
41% over limit
Discharged 0.0565 mg/L against a permitted limit of 0.04 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total recoverable
88% over limit
Discharged 0.0565 mg/L against a permitted limit of 0.03 mg/L (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Zinc, total recoverable
43% over limit
Discharged 0.0429 mg/L against a permitted limit of 0.03 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Zinc, total recoverable
7% over limit
Discharged 0.0429 mg/L against a permitted limit of 0.04 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
Nitrite + Nitrate total [as N]
594% over limit
Discharged 125 mg/L against a permitted limit of 18 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Zinc, total recoverable
42% over limit
Discharged 0.0425 mg/L against a permitted limit of 0.03 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Zinc, total recoverable
6% over limit
Discharged 0.0425 mg/L against a permitted limit of 0.04 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Coliform, total general
18% over limit
Discharged 27.2 MPN/100mL against a permitted limit of 23 MPN/100mL (30DA MAX)
DMR, Limited - Numeric Violation
Nitrite + Nitrate total [as N]
1150% over limit
Discharged 125 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Zinc, total recoverable
12% over limit
Discharged 0.0337 mg/L against a permitted limit of 0.03 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2025
%Surv Static Renewal 96Hr Oncorhynchus mykiss
8% over limit
Discharged 83 % against a permitted limit of 90 % (MEDN MN)
DMR, Limited - Numeric Violation
December 31, 2024
Zinc, total recoverable
0% over limit
Discharged 0.0301 mg/L against a permitted limit of 0.03 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2024
Zinc, total recoverable
31% over limit
Discharged 0.0393 mg/L against a permitted limit of 0.03 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Zinc, total recoverable
39% over limit
Discharged 0.0556 mg/L against a permitted limit of 0.04 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total recoverable
85% over limit
Discharged 0.0556 mg/L against a permitted limit of 0.03 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Zinc, total recoverable
39% over limit
Discharged 0.0554 mg/L against a permitted limit of 0.04 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total recoverable
85% over limit
Discharged 0.0554 mg/L against a permitted limit of 0.03 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)