CHARLESTOWN MUNICIPAL WWTP
NPDES ID: IN0020508
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
June 30, 2026
E. coli, colony forming units [CFU]
929% over limit
Discharged 2419 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
213% over limit
Discharged 5 mg/L against a permitted limit of 1.6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
458% over limit
Discharged 13.4 mg/L against a permitted limit of 2.4 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
April 30, 2025
E. coli, colony forming units [CFU]
5414% over limit
Discharged 6893 MPN/100mL against a permitted limit of 125 MPN/100mL (MO GEO)
DMR, Limited - Numeric Violation
E. coli, colony forming units [CFU]
1171% over limit
Discharged 2987 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
80% over limit
Discharged 1.8 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
E. coli, colony forming units [CFU]
2833% over limit
Discharged 6893 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2024
E. coli, colony forming units [CFU]
330% over limit
Discharged 1011 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (4 months ago)
Last confirmed
August 15, 2026 (9 hours ago)