ALTON STEEL INC
NPDES ID: IL0000612
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: 4 effluent violations.
Violations
June 30, 2026
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
May 31, 2026
Oil & Grease
133% over limit
Discharged 139.35529883 kg/d against a permitted limit of 59.928 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
1500% over limit
Discharged 0.8 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2026
Chlorine, total residual
300% over limit
Discharged 0.2 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 9.5 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
49% over limit
Discharged 123.08847897 kg/d against a permitted limit of 82.628 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2024
Solids, total suspended
52% over limit
Discharged 125.27221895 kg/d against a permitted limit of 82.628 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Lead, total [as Pb]
19% over limit
Discharged 0.46308 kg/d against a permitted limit of 0.39044 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (4 months ago)
Last confirmed
August 16, 2026 (22 minutes ago)