NPDES ID: COG591205
X — SNC: Effluent violation (non-monthly average limit)
The facility discharged more of a pollutant than its permit allows, measured over a period other than a monthly average.
Violations
March 31, 2026
Nitrogen, ammonia total [as N]
128% over limit
Discharged 1.82 mg/L against a permitted limit of 0.8 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Arsenic, total recoverable
1650% over limit
Discharged 0.00035 mg/L against a permitted limit of 0.00002 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
81% over limit
Discharged 1.45 mg/L against a permitted limit of 0.8 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
288% over limit
Discharged 3.1 mg/L against a permitted limit of 0.8 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Zinc, potentially dissolved
5% over limit
Discharged 0.10700001 mg/L against a permitted limit of 0.102 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, potentially dissolved
39% over limit
Discharged 0.10700001 mg/L against a permitted limit of 0.077 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Zinc, potentially dissolved
13% over limit
Discharged 0.087 mg/L against a permitted limit of 0.077 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
9% over limit
Discharged 83.64 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
29% over limit
Discharged 0.9 mg/L against a permitted limit of 0.7 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Arsenic, total recoverable
5900% over limit
Discharged 0.0012 mg/L against a permitted limit of 0.00002 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Zinc, potentially dissolved
4% over limit
Discharged 0.10600001 mg/L against a permitted limit of 0.102 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, potentially dissolved
38% over limit
Discharged 0.10600001 mg/L against a permitted limit of 0.077 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Chromium, hexavalent dissolved [as Cr]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Chromium, hexavalent dissolved [as Cr]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
41% over limit
Discharged 1.13 mg/L against a permitted limit of 0.8 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Nitrogen, ammonia total [as N]
78% over limit
Discharged 1.42 mg/L against a permitted limit of 0.8 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Nitrogen, ammonia total [as N]
256% over limit
Discharged 2.845 mg/L against a permitted limit of 0.8 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Chromium, trivalent, potentially dissolvd
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Cadmium, potentially dissolvd
0% over limit
Discharged 0 mg/L against a permitted limit of 0.0005 mg/L (30DA AVG)
DMR, Limited - Overdue
Chromium, trivalent total recoverable
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Cadmium, potentially dissolvd
0% over limit
Discharged 0 mg/L against a permitted limit of 0.0011 mg/L (DAILY MX)
DMR, Limited - Overdue
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)