PAOLI MUNICIPAL WWTP
NPDES ID: IN0024023
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: 16 effluent violations, 19 single-event violations, 2 reporting violations.
Violations
June 30, 2026
E. coli, colony forming units [CFU]
176% over limit
Discharged 649 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
327% over limit
Discharged 65.97527945 kg/d against a permitted limit of 15.43599987 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
12% over limit
Discharged 1.1179 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 10 SU against a permitted limit of 9 SU (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1484% over limit
Discharged 17.428 mg/L against a permitted limit of 1.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
806% over limit
Discharged 205.56665827 kg/d against a permitted limit of 22.69999981 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1968% over limit
Discharged 33.088 mg/L against a permitted limit of 1.6 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 5.8 SU against a permitted limit of 6 SU (DAILY MN)
DMR, Limited - Numeric Violation
May 31, 2026
Nitrogen, ammonia total [as N]
1% over limit
Discharged 22.99827781 kg/d against a permitted limit of 22.69999981 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
E. coli, colony forming units [CFU]
11% over limit
Discharged 260 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
452% over limit
Discharged 8.8277 mg/L against a permitted limit of 1.6 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
12% over limit
Discharged 5.29 mg/L against a permitted limit of 6 mg/L (DLYAVMIN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
421% over limit
Discharged 5.7361 mg/L against a permitted limit of 1.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Nitrogen, ammonia total [as N]
1149% over limit
Discharged 19.989 mg/L against a permitted limit of 1.6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1014% over limit
Discharged 26.731 mg/L against a permitted limit of 2.4 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
E. coli, colony forming units [CFU]
Limit violation
Discharged 2419 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
E. coli, colony forming units [CFU]
0% over limit
Discharged 22 MPN/100mL against a permitted limit of 125 MPN/100mL (MO GEO)
DMR, Limited - Overdue
Precipitation, monthly accumulation
0% over limit
Discharged 0 in/d against a permitted limit of 0 in/d (MO TOTAL)
DMR, Monitor Only - Overdue
March 31, 2026
pH
0% over limit
Discharged 9.3 SU against a permitted limit of 9 SU (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2026
pH
0% over limit
Discharged 9.6 SU against a permitted limit of 9 SU (DAILY MX)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
10% over limit
Discharged 1.1019 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.2455 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
November 30, 2025
Solids, total suspended
0% over limit
Discharged 7.71345994 kg/d against a permitted limit of 254.23999786 kg/d (MX WK AV)
DMR, Limited - Overdue
October 31, 2025
BOD, carbonaceous [5 day, 20 C]
9% over limit
Discharged 10.9 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
E. coli, colony forming units [CFU]
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 125 MPN/100mL (MO GEO)
DMR, Limited - Overdue
E. coli, colony forming units [CFU]
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Overdue
June 30, 2025
pH
0% over limit
Discharged 9.2 SU against a permitted limit of 6 SU (DAILY MN)
DMR, Limited - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 0.278302 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 0.211 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Overdue
May 31, 2025
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 4.7 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 9.95621992 kg/d against a permitted limit of 140.73999882 kg/d (MO AVG)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 7.12 mg/L against a permitted limit of 15 mg/L (MX WK AV)
DMR, Limited - Overdue
E. coli, colony forming units [CFU]
0% over limit
Discharged 16 MPN/100mL against a permitted limit of 125 MPN/100mL (MO GEO)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 18.65939984 kg/d against a permitted limit of 213.37999821 kg/d (MX WK AV)
DMR, Limited - Overdue
December 31, 2024
Oxygen, dissolved [DO]
0% over limit
Discharged 7 mg/L against a permitted limit of 6 mg/L (DLYAVMIN)
DMR, Limited - Overdue
November 30, 2024
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 8.66685993 kg/d against a permitted limit of 140.73999882 kg/d (MO AVG)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 10.93231991 kg/d against a permitted limit of 213.37999821 kg/d (MX WK AV)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 5.4 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Overdue
September 30, 2024
E. coli, colony forming units [CFU]
0% over limit
Discharged 120 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Overdue
E. coli, colony forming units [CFU]
0% over limit
Discharged 15 MPN/100mL against a permitted limit of 125 MPN/100mL (MO GEO)
DMR, Limited - Overdue
August 31, 2024
E. coli, colony forming units [CFU]
0% over limit
Discharged 56 MPN/100mL against a permitted limit of 125 MPN/100mL (MO GEO)
DMR, Limited - Overdue
E. coli, colony forming units [CFU]
930% over limit
Discharged 2420 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 (4 hours ago)