NPDES ID: NHG580002
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: 3 effluent violations, 4 reporting violations.
Violations
June 30, 2026
Copper, total recoverable
1187% over limit
Discharged 0.35000002 mg/L against a permitted limit of 0.0272 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total recoverable
867% over limit
Discharged 0.17890001 mg/L against a permitted limit of 0.0185 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
6% over limit
Discharged 22.7 mg/L against a permitted limit of 21.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Aluminum, total recoverable
0% over limit
Discharged 0.05 mg/L against a permitted limit of 0.087 mg/L (MO AVG)
DMR, Limited - Overdue
Aluminum, total recoverable
0% over limit
Discharged 0.05 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
March 31, 2026
Aluminum, total recoverable
0% over limit
Discharged 0.05 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Aluminum, total recoverable
0% over limit
Discharged 0.05 mg/L against a permitted limit of 0.087 mg/L (MO AVG)
DMR, Limited - Overdue
February 28, 2026
Aluminum, total recoverable
0% over limit
Discharged 0.03 mg/L against a permitted limit of 0.087 mg/L (MO AVG)
DMR, Limited - Overdue
Aluminum, total recoverable
0% over limit
Discharged 0.03 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Copper, total recoverable
27% over limit
Discharged 0.0235 mg/L against a permitted limit of 0.0185 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Aluminum, total recoverable
0% over limit
Discharged 0.05 mg/L against a permitted limit of 0.087 mg/L (MO AVG)
DMR, Limited - Overdue
Aluminum, total recoverable
0% over limit
Discharged 0.05 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
August 31, 2025
Aluminum, total recoverable
90% over limit
Discharged 0.16500001 mg/L against a permitted limit of 0.087 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
405% over limit
Discharged 1.81145998 kg/d against a permitted limit of 0.35866 kg/d (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Phosphorus, total [as P]
39% over limit
Discharged 0.4994 kg/d against a permitted limit of 0.35866 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Aluminum, total recoverable
97% over limit
Discharged 0.17150001 mg/L against a permitted limit of 0.087 mg/L (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Aluminum, total recoverable
268% over limit
Discharged 0.32000002 mg/L against a permitted limit of 0.087 mg/L (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Phosphorus, total [as P]
257% over limit
Discharged 1.28027999 kg/d against a permitted limit of 0.35866 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Aluminum, total recoverable
389% over limit
Discharged 0.42500002 mg/L against a permitted limit of 0.087 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Aluminum, total recoverable
434% over limit
Discharged 0.46500002 mg/L against a permitted limit of 0.087 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
14% over limit
Discharged 0.031 mg/L against a permitted limit of 0.0272 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2024
Aluminum, total recoverable
2% over limit
Discharged 0.0885 mg/L against a permitted limit of 0.087 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
67% over limit
Discharged 0.59927999 kg/d against a permitted limit of 0.35866 kg/d (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2024
Aluminum, total recoverable
118% over limit
Discharged 0.19000001 mg/L against a permitted limit of 0.087 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
25% over limit
Discharged 0.44946 kg/d against a permitted limit of 0.35866 kg/d (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (4 months ago)
Last confirmed
August 15, 2026 (11 hours ago)