WINAMAC WWTP
NPDES ID: IN0020516
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: 5 effluent violations.
Violations
May 31, 2026
Chlorine, total residual
0% over limit
Discharged 0.06 mg/L against a permitted limit of 0.06 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2026
Nitrogen, ammonia total [as N]
23% over limit
Discharged 31.04815174 kg/d against a permitted limit of 25.15159979 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
17% over limit
Discharged 11.906 mg/L against a permitted limit of 10.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
39% over limit
Discharged 23.2842978 kg/d against a permitted limit of 16.75259986 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
17% over limit
Discharged 0.07 mg/L against a permitted limit of 0.06 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, ammonia total [as N]
17% over limit
Discharged 17.9 mg/L against a permitted limit of 15.3 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
13% over limit
Discharged 11.568 mg/L against a permitted limit of 10.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
93% over limit
Discharged 19.733 mg/L against a permitted limit of 10.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
8% over limit
Discharged 18.14910385 kg/d against a permitted limit of 16.75259986 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
37% over limit
Discharged 20.967 mg/L against a permitted limit of 15.3 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
90% over limit
Discharged 19.35 mg/L against a permitted limit of 10.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
0% over limit
Discharged 16.80707986 kg/d against a permitted limit of 16.75259986 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
48% over limit
Discharged 22.63 mg/L against a permitted limit of 15.3 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, ammonia total [as N]
116% over limit
Discharged 22.02 mg/L against a permitted limit of 10.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
5% over limit
Discharged 17.58387385 kg/d against a permitted limit of 16.75259986 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
59% over limit
Discharged 24.367 mg/L against a permitted limit of 15.3 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
November 30, 2025
Phosphorus, total [as P]
47% over limit
Discharged 1.47 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Phosphorus, total [as P]
32% over limit
Discharged 1.3236 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Chlorine, total residual
0% over limit
Discharged 0.06 mg/L against a permitted limit of 0.06 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2025
Phosphorus, total [as P]
30% over limit
Discharged 1.302 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
33% over limit
Discharged 0.08 mg/L against a permitted limit of 0.06 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
70% over limit
Discharged 0.15 mg/L against a permitted limit of 0.5 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
June 30, 2025
Chlorine, total residual
86% over limit
Discharged 0.07 mg/L against a permitted limit of 0.5 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
Precipitation, monthly accumulation
0% over limit
Discharged 0.14278601 in/d against a permitted limit of 0 in/d (MO TOTAL)
DMR, Monitor Only - Overdue
May 31, 2025
pH
0% over limit
Discharged 6.7 SU against a permitted limit of 6 SU (DAILY MN)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
16% over limit
Discharged 17.8 mg/L against a permitted limit of 15.3 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Copper, total recoverable
0% over limit
Discharged 0.013 mg/L against a permitted limit of 0.043 mg/L (MO AVG)
DMR, Limited - Overdue
Phosphorus, total [as P]
48% over limit
Discharged 1.477 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Phosphorus, total [as P]
79% over limit
Discharged 1.794 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 7.797 mg/L against a permitted limit of 40 mg/L (MX WK AV)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
27% over limit
Discharged 12.96 mg/L against a permitted limit of 10.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Flow, total
0% over limit
Discharged 0.29925842 MGD against a permitted limit of 0 MGD (MO TOTAL)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 4.7 SU against a permitted limit of 6 SU (DAILY MN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
78% over limit
Discharged 27.3 mg/L against a permitted limit of 15.3 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, ammonia total [as N]
6% over limit
Discharged 26.71063578 kg/d against a permitted limit of 25.15159979 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
4% over limit
Discharged 1.0375 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Nitrogen, ammonia total [as N]
12% over limit
Discharged 18.78197984 kg/d against a permitted limit of 16.75259986 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
107% over limit
Discharged 21.09 mg/L against a permitted limit of 10.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
54% over limit
Discharged 23.57 mg/L against a permitted limit of 15.3 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 11.05 mg/L against a permitted limit of 40 mg/L (MX WK AV)
DMR, Limited - Overdue
January 31, 2025
Phosphorus, total [as P]
10% over limit
Discharged 1.095 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
68% over limit
Discharged 17.16 mg/L against a permitted limit of 10.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
33% over limit
Discharged 20.3 mg/L against a permitted limit of 15.3 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
October 31, 2024
Chlorine, total residual
0% over limit
Discharged 0.06 mg/L against a permitted limit of 0.06 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2024
Precipitation, monthly accumulation
0% over limit
Discharged 0.031584 in/d against a permitted limit of 0 in/d (MO TOTAL)
DMR, Monitor Only - Overdue
July 31, 2024
Precipitation, monthly accumulation
0% over limit
Discharged 0.31518202 in/d against a permitted limit of 0 in/d (MO TOTAL)
DMR, Monitor Only - Overdue
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)