NPDES ID: COG591196
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: 9 effluent violations.
Violations
May 31, 2026
Zinc, potentially dissolved
40% over limit
Discharged 0.14000001 mg/L against a permitted limit of 0.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, inorganic total
53% over limit
Discharged 48.8 mg/L against a permitted limit of 32 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
32% over limit
Discharged 9.52 mg/L against a permitted limit of 7.2 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Zinc, potentially dissolved
6% over limit
Discharged 0.14000001 mg/L against a permitted limit of 0.13200001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Sulfide-hydrogen sulfide [undissociated]
285% over limit
Discharged 0.05 mg/L against a permitted limit of 0.013 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Sulfide-hydrogen sulfide [undissociated]
285% over limit
Discharged 0.05 mg/L against a permitted limit of 0.013 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Nitrogen, inorganic total
75% over limit
Discharged 55.9 mg/L against a permitted limit of 32 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
23% over limit
Discharged 8.7 mg/L against a permitted limit of 7.1 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Zinc, potentially dissolved
28% over limit
Discharged 0.12800001 mg/L against a permitted limit of 0.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Zinc, potentially dissolved
95% over limit
Discharged 0.19500001 mg/L against a permitted limit of 0.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Zinc, potentially dissolved
48% over limit
Discharged 0.19500001 mg/L against a permitted limit of 0.13200001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Sulfide-hydrogen sulfide [undissociated]
285% over limit
Discharged 0.05 mg/L against a permitted limit of 0.013 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Zinc, potentially dissolved
67% over limit
Discharged 0.22000001 mg/L against a permitted limit of 0.13200001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, potentially dissolved
120% over limit
Discharged 0.22000001 mg/L against a permitted limit of 0.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Zinc, potentially dissolved
171% over limit
Discharged 0.27100001 mg/L against a permitted limit of 0.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 6.31 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
Zinc, potentially dissolved
105% over limit
Discharged 0.27100001 mg/L against a permitted limit of 0.13200001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2025
pH
0% over limit
Discharged 6.2 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
Zinc, potentially dissolved
810% over limit
Discharged 0.91000004 mg/L against a permitted limit of 0.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Zinc, potentially dissolved
589% over limit
Discharged 0.91000004 mg/L against a permitted limit of 0.13200001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Iron, dissolved [as Fe]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
November 30, 2025
Zinc, potentially dissolved
673% over limit
Discharged 1.02000005 mg/L against a permitted limit of 0.13200001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, potentially dissolved
920% over limit
Discharged 1.02000005 mg/L against a permitted limit of 0.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Cadmium, potentially dissolvd
97% over limit
Discharged 0.0012 mg/L against a permitted limit of 0.00061 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 6.2 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
October 31, 2025
Zinc, potentially dissolved
1020% over limit
Discharged 1.12000005 mg/L against a permitted limit of 0.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Zinc, potentially dissolved
748% over limit
Discharged 1.12000005 mg/L against a permitted limit of 0.13200001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Cadmium, potentially dissolvd
31% over limit
Discharged 0.0008 mg/L against a permitted limit of 0.00061 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Zinc, potentially dissolved
130% over limit
Discharged 0.30400001 mg/L against a permitted limit of 0.13200001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, potentially dissolved
204% over limit
Discharged 0.30400001 mg/L against a permitted limit of 0.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Zinc, potentially dissolved
61% over limit
Discharged 0.21300001 mg/L against a permitted limit of 0.13200001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, potentially dissolved
113% over limit
Discharged 0.21300001 mg/L against a permitted limit of 0.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Zinc, potentially dissolved
70% over limit
Discharged 0.17000001 mg/L against a permitted limit of 0.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Zinc, potentially dissolved
29% over limit
Discharged 0.17000001 mg/L against a permitted limit of 0.13200001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
June 30, 2025
Solids, total suspended
17% over limit
Discharged 35 mg/L against a permitted limit of 30 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
49% over limit
Discharged 0.67 mg/L against a permitted limit of 0.451 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Zinc, potentially dissolved
288% over limit
Discharged 0.38800002 mg/L against a permitted limit of 0.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Zinc, potentially dissolved
194% over limit
Discharged 0.38800002 mg/L against a permitted limit of 0.13200001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
34% over limit
Discharged 0.67 mg/L against a permitted limit of 0.5 mg/L (MX 7D AV)
DMR, Limited - Numeric Violation
April 30, 2025
Zinc, potentially dissolved
10% over limit
Discharged 0.11000001 mg/L against a permitted limit of 0.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Zinc, potentially dissolved
520% over limit
Discharged 0.62000003 mg/L against a permitted limit of 0.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Zinc, potentially dissolved
370% over limit
Discharged 0.62000003 mg/L against a permitted limit of 0.13200001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2025
Zinc, potentially dissolved
20% over limit
Discharged 0.12000001 mg/L against a permitted limit of 0.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Zinc, potentially dissolved
32% over limit
Discharged 0.13200001 mg/L against a permitted limit of 0.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
November 30, 2024
Zinc, potentially dissolved
109% over limit
Discharged 0.20900001 mg/L against a permitted limit of 0.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Zinc, potentially dissolved
58% over limit
Discharged 0.20900001 mg/L against a permitted limit of 0.13200001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2024
Zinc, potentially dissolved
193% over limit
Discharged 0.29300001 mg/L against a permitted limit of 0.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Zinc, potentially dissolved
122% over limit
Discharged 0.29300001 mg/L against a permitted limit of 0.13200001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2024
Zinc, potentially dissolved
53% over limit
Discharged 0.20200001 mg/L against a permitted limit of 0.13200001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, potentially dissolved
102% over limit
Discharged 0.20200001 mg/L against a permitted limit of 0.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
August 31, 2024
Zinc, potentially dissolved
236% over limit
Discharged 0.44300002 mg/L against a permitted limit of 0.13200001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, potentially dissolved
343% over limit
Discharged 0.44300002 mg/L against a permitted limit of 0.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
July 31, 2024
Zinc, potentially dissolved
13% over limit
Discharged 0.14900001 mg/L against a permitted limit of 0.13200001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, potentially dissolved
49% over limit
Discharged 0.14900001 mg/L against a permitted limit of 0.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)