TROY WASTEWATER TREATMENT PLANT
NPDES ID: NHG580001
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
April 30, 2026
Copper, total recoverable
10% over limit
Discharged 0.0034 mg/L against a permitted limit of 0.0031 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Copper, total recoverable
150% over limit
Discharged 0.00775 mg/L against a permitted limit of 0.0031 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
138% over limit
Discharged 0.01 mg/L against a permitted limit of 0.0042 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2026
Copper, total recoverable
138% over limit
Discharged 0.01 mg/L against a permitted limit of 0.0042 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total recoverable
190% over limit
Discharged 0.009 mg/L against a permitted limit of 0.0031 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Copper, total recoverable
179% over limit
Discharged 0.00866 mg/L against a permitted limit of 0.0031 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
138% over limit
Discharged 0.01 mg/L against a permitted limit of 0.0042 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2025
pH
0% over limit
Discharged 0 SU against a permitted limit of 0 SU (DAILY MX)
DMR, Monitor Only - Overdue
Temperature, water deg. centigrade
0% over limit
Discharged 0 deg C against a permitted limit of 0 deg C (DAILY MX)
DMR, Monitor Only - Overdue
Hardness, total [as CaCO3]
0% over limit
Discharged 28 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
July 31, 2025
Phosphorus, total [as P]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
May 31, 2025
Phosphorus, total [as P]
15% over limit
Discharged 0.84807199 kg/d against a permitted limit of 0.74001999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Phosphorus, total [as P]
53% over limit
Discharged 1.13499999 kg/d against a permitted limit of 0.74001999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
4% over limit
Discharged 0.0073 mg/L against a permitted limit of 0.007 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Copper, total recoverable
8% over limit
Discharged 0.00755 mg/L against a permitted limit of 0.007 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Hardness, total [as CaCO3]
0% over limit
Discharged 26 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)