HAMMOND WASTEWATER FACILITY
NPDES ID: IN0023060
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: 4 effluent violations.
Violations
June 30, 2026
Mercury, total recoverable
35% over limit
Discharged 0.0003178 kg/d against a permitted limit of 0.00023608 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Mercury, total recoverable
18% over limit
Discharged 0.00000154 mg/L against a permitted limit of 0.0000013 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Mercury, total recoverable
23% over limit
Discharged 0.0000016 mg/L against a permitted limit of 0.0000013 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Mercury, total recoverable
54% over limit
Discharged 0.0003632 kg/d against a permitted limit of 0.00023608 kg/d (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Solids, total suspended
15% over limit
Discharged 11.4 mg/L against a permitted limit of 9.9 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
August 31, 2025
E. coli, colony forming units [CFU]
34% over limit
Discharged 316 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2025
E. coli, colony forming units [CFU]
91% over limit
Discharged 450 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
June 30, 2025
Mercury, total recoverable
54% over limit
Discharged 0.0003632 kg/d against a permitted limit of 0.00023608 kg/d (MO AVG)
DMR, Limited - Numeric Violation
E. coli, colony forming units [CFU]
226% over limit
Discharged 765 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Mercury, total recoverable
103% over limit
Discharged 0.00000264 mg/L against a permitted limit of 0.0000013 mg/L (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Oxygen, dissolved [DO]
5% over limit
Discharged 5.7 mg/L against a permitted limit of 6 mg/L (DLYAVMIN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
15% over limit
Discharged 3.9 mg/L against a permitted limit of 3.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
E. coli, colony forming units [CFU]
164% over limit
Discharged 620 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2025
Nitrogen, ammonia total [as N]
3% over limit
Discharged 3.6 mg/L against a permitted limit of 3.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
68% over limit
Discharged 2.13 mg/L against a permitted limit of 1.27 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Overflow volume [SS0 volume, CSO volume]
0% over limit
Discharged 1e-7 gal against a permitted limit of 0 gal (MO TOTAL)
DMR, Monitor Only - Overdue
Duration
0% over limit
Discharged 0.00056164 d against a permitted limit of 0 d (MO TOTAL)
DMR, Monitor Only - Overdue
November 30, 2024
Discharge event observation [Visual Monitoring]
0% over limit
Discharged 0.0329 occur/d against a permitted limit of 0 occur/d (MO TOTAL)
DMR, Monitor Only - Overdue
First flagged
April 14, 2026 (4 months ago)
Last confirmed
August 15, 2026 (3 hours ago)