CLEVELAND-CLIFFS STEEL LLC - INDIANA HARBOR EAST
NPDES ID: IN0000094
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: 2 single-event violations.
Violations
January 31, 2026
Oil and grease, hexane extr method
65% over limit
Discharged 24.7 mg/L against a permitted limit of 15 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Oil and grease, hexane extr method
44% over limit
Discharged 14.4 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
pH
0% over limit
Discharged 11.5 SU against a permitted limit of 9.5 SU (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2025
pH
0% over limit
Discharged 11.3 SU against a permitted limit of 9.5 SU (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2025
Lead, total recoverable
0% over limit
Discharged 0.0011 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Selenium, total recoverable
0% over limit
Discharged 0.127 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
First flagged
April 14, 2026 (5 months ago)
Last confirmed
September 15, 2026 (5 days ago)