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.
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
Zinc, total recoverable
0% over limit
Discharged 0.87400004 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Selenium, total recoverable
0% over limit
Discharged 0.103058 kg/d against a permitted limit of 0 kg/d (DAILY MX)
DMR, Monitor Only - Overdue
Zinc, total recoverable
0% over limit
Discharged 1.52543999 kg/d against a permitted limit of 2.28815998 kg/d (MO AVG)
DMR, Limited - Overdue
Selenium, total recoverable
0% over limit
Discharged 0.001 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Phenolics, total recoverable
0% over limit
Discharged 0.007 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Lead, total recoverable
0% over limit
Discharged 0.0001 mg/L against a permitted limit of 0.014 mg/L (MO AVG)
DMR, Limited - Overdue
Phenolics, total recoverable
0% over limit
Discharged 0.0105328 kg/d against a permitted limit of 0.66283999 kg/d (DAILY MX)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.689 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Zinc, total recoverable
0% over limit
Discharged 0.63559999 kg/d against a permitted limit of 4.72159996 kg/d (MO AVG)
DMR, Limited - Overdue
Zinc, total recoverable
0% over limit
Discharged 0.0174 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Lead, total recoverable
0% over limit
Discharged 0.0559782 kg/d against a permitted limit of 0.4994 kg/d (MO AVG)
DMR, Limited - Overdue
Oil and grease, hexane extr method
0% over limit
Discharged 5.13019996 kg/d against a permitted limit of 185.23199844 kg/d (DAILY MX)
DMR, Limited - Overdue
Lead, total recoverable
0% over limit
Discharged 0.0054 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Zinc, total recoverable
0% over limit
Discharged 0.12050001 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Lead, total recoverable
0% over limit
Discharged 0.0021338 kg/d against a permitted limit of 0.99425999 kg/d (MO AVG)
DMR, Limited - Overdue
Selenium, total recoverable
0% over limit
Discharged 0.227 kg/d against a permitted limit of 0 kg/d (DAILY MX)
DMR, Monitor Only - Overdue
Selenium, total recoverable
0% over limit
Discharged 0.0908 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Lead, total recoverable
0% over limit
Discharged 0.0014 mg/L against a permitted limit of 0.014 mg/L (MO AVG)
DMR, Limited - Overdue
Zinc, total recoverable
0% over limit
Discharged 9.39779992 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Phenolics, total recoverable
0% over limit
Discharged 0.004 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.462 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Phenolics, total recoverable
0% over limit
Discharged 0.03 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Selenium, total recoverable
0% over limit
Discharged 0.069462 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Phenolics, total recoverable
0% over limit
Discharged 0.62651999 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Phenolics, total recoverable
0% over limit
Discharged 0.0013166 kg/d against a permitted limit of 0.33142 kg/d (MO AVG)
DMR, Limited - Overdue
Lead, total recoverable
0% over limit
Discharged 0.0091254 kg/d against a permitted limit of 1.04419999 kg/d (MO AVG)
DMR, Limited - Overdue
June 30, 2025
Zinc, total recoverable
0% over limit
Discharged 0.3632 kg/d against a permitted limit of 4.72159996 kg/d (MO AVG)
DMR, Limited - Overdue
Lead, total recoverable
0% over limit
Discharged 0.003178 kg/d against a permitted limit of 4.56723996 kg/d (DAILY MX)
DMR, Limited - Overdue
Lead, total recoverable
0% over limit
Discharged 0.0054 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Lead, total recoverable
0% over limit
Discharged 0.000454 kg/d against a permitted limit of 1.52543999 kg/d (MO AVG)
DMR, Limited - Overdue
Zinc, total recoverable
0% over limit
Discharged 0.0893 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Zinc, total recoverable
0% over limit
Discharged 0.0112 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Zinc, total recoverable
0% over limit
Discharged 0.1362 kg/d against a permitted limit of 2.28815998 kg/d (MO AVG)
DMR, Limited - Overdue
Selenium, total recoverable
0% over limit
Discharged 0.046762 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Lead, total recoverable
0% over limit
Discharged 0.0001 mg/L against a permitted limit of 0.014 mg/L (MO AVG)
DMR, Limited - Overdue
Zinc, total recoverable
0% over limit
Discharged 1.04419999 kg/d against a permitted limit of 9.98799992 kg/d (DAILY MX)
DMR, Limited - Overdue
Selenium, total recoverable
0% over limit
Discharged 0.0017 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Selenium, total recoverable
0% over limit
Discharged 0.075 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Zinc, total recoverable
0% over limit
Discharged 0.454 kg/d against a permitted limit of 6.85539994 kg/d (DAILY MX)
DMR, Limited - Overdue
Selenium, total recoverable
0% over limit
Discharged 0.1 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Lead, total recoverable
0% over limit
Discharged 0.0007 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Lead, total recoverable
0% over limit
Discharged 0.0384538 kg/d against a permitted limit of 0.99879999 kg/d (DAILY MX)
DMR, Limited - Overdue
Zinc, total recoverable
0% over limit
Discharged 0.33800002 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Zinc, total recoverable
0% over limit
Discharged 0.80000004 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Zinc, total recoverable
0% over limit
Discharged 7.26399994 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Zinc, total recoverable
0% over limit
Discharged 0.02 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Lead, total recoverable
0% over limit
Discharged 0.0120764 kg/d against a permitted limit of 1.04419999 kg/d (MO AVG)
DMR, Limited - Overdue
March 31, 2025
pH
0% over limit
Discharged 10.7 SU against a permitted limit of 9.5 SU (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2025
Flow rate
0% over limit
Discharged 3.4 MGD against a permitted limit of 0 MGD (HR AV MX)
DMR, Monitor Only - Overdue
Zinc, total recoverable
0% over limit
Discharged 0.0053 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
November 30, 2024
Oil and grease, hexane extr method
0% over limit
Discharged 71.2779994 kg/d against a permitted limit of 645.13399458 kg/d (MO AVG)
DMR, Limited - Overdue
Oil and grease, hexane extr method
0% over limit
Discharged 4.2 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Overdue
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (5 days ago)