MILAN WWTP
NPDES ID: IN0023779
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: 7 effluent violations.
Violations
May 31, 2026
Solids, total suspended
20% over limit
Discharged 28.80175976 kg/d against a permitted limit of 24.062 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
35% over limit
Discharged 48.30559959 kg/d against a permitted limit of 35.866 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
E. coli, colony forming units [CFU]
96% over limit
Discharged 461.1 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2026
E. coli, colony forming units [CFU]
141% over limit
Discharged 301 MPN/100mL against a permitted limit of 125 MPN/100mL (MO GEO)
DMR, Limited - Numeric Violation
E. coli, colony forming units [CFU]
930% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
46% over limit
Discharged 4.83 mg/L against a permitted limit of 3.3 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
8% over limit
Discharged 2.37 mg/L against a permitted limit of 2.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Solids, total suspended
51% over limit
Discharged 77.67939935 kg/d against a permitted limit of 51.302 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
84% over limit
Discharged 82.88 mg/L against a permitted limit of 45 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Solids, total suspended
255% over limit
Discharged 272.30919771 kg/d against a permitted limit of 76.726 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
February 28, 2026
Solids, total suspended
68% over limit
Discharged 75.73 mg/L against a permitted limit of 45 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Solids, total suspended
58% over limit
Discharged 121.58119898 kg/d against a permitted limit of 76.726 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
January 31, 2026
Solids, total suspended
70% over limit
Discharged 76.65 mg/L against a permitted limit of 45 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Solids, total suspended
70% over limit
Discharged 50.9 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Solids, total suspended
34% over limit
Discharged 28.1 mg/L against a permitted limit of 21 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
52% over limit
Discharged 46.80739961 kg/d against a permitted limit of 30.872 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
Solids, total suspended
25% over limit
Discharged 17.5 mg/L against a permitted limit of 14 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
85% over limit
Discharged 44.53739963 kg/d against a permitted limit of 24.062 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
157% over limit
Discharged 92.11659923 kg/d against a permitted limit of 35.866 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
October 31, 2025
Nitrogen, ammonia total [as N]
186% over limit
Discharged 5.72 mg/L against a permitted limit of 2 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
E. coli, colony forming units [CFU]
286% over limit
Discharged 483 MPN/100mL against a permitted limit of 125 MPN/100mL (MO GEO)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
4% over limit
Discharged 3.53665997 kg/d against a permitted limit of 3.405 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
5% over limit
Discharged 1.37 mg/L against a permitted limit of 1.3 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Nitrogen, ammonia total [as N]
3% over limit
Discharged 3.49125997 kg/d against a permitted limit of 3.405 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
63% over limit
Discharged 3.25 mg/L against a permitted limit of 2 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
April 30, 2025
E. coli, colony forming units [CFU]
317% over limit
Discharged 980 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
E. coli, colony forming units [CFU]
303% over limit
Discharged 504 MPN/100mL against a permitted limit of 125 MPN/100mL (MO GEO)
DMR, Limited - Numeric Violation
October 31, 2024
E. coli, colony forming units [CFU]
502% over limit
Discharged 1414 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2024
E. coli, colony forming units [CFU]
161% over limit
Discharged 613 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2024
Nitrogen, ammonia total [as N]
55% over limit
Discharged 3.1 mg/L against a permitted limit of 2 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (4 days ago)