MATTOON EATER TREATMENT PLANT
NPDES ID: ILG640205
X — SNC: Effluent violation (non-monthly average limit)
The facility discharged more of a pollutant than its permit allows, measured over a period other than a monthly average.
This quarter: 1 effluent violation.
Violations
June 30, 2026
Chlorine, total residual
80% over limit
Discharged 0.09 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2026
pH
0% over limit
Discharged 10 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Numeric Violation
Chlorine, total residual
180% over limit
Discharged 0.14 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2026
pH
0% over limit
Discharged 10 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Numeric Violation
January 31, 2026
Chlorine, total residual
480% over limit
Discharged 0.29 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.9 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Numeric Violation
December 31, 2025
Chlorine, total residual
420% over limit
Discharged 0.26 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.4 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Numeric Violation
November 30, 2025
Chlorine, total residual
180% over limit
Discharged 0.14 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2025
pH
0% over limit
Discharged 9.5 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Numeric Violation
September 30, 2025
pH
0% over limit
Discharged 9.2 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Numeric Violation
August 31, 2025
Chlorine, total residual
100% over limit
Discharged 0.1 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.5 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Numeric Violation
July 31, 2025
pH
0% over limit
Discharged 9.2 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Numeric Violation
May 31, 2025
pH
0% over limit
Discharged 9.4 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Numeric Violation
April 30, 2025
Chlorine, total residual
80% over limit
Discharged 0.09 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.3 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Numeric Violation
March 31, 2025
pH
0% over limit
Discharged 9.6 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Numeric Violation
February 28, 2025
Chlorine, total residual
540% over limit
Discharged 0.32 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 10.4 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Numeric Violation
January 31, 2025
pH
0% over limit
Discharged 10.6 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Numeric Violation
Chlorine, total residual
540% over limit
Discharged 0.32 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
pH
0% over limit
Discharged 9.8 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)