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NPDES IN0059650 · Clean Water Act

CLEVELAND-CLIFFS STEEL CORP. - ROCKPORT WORKS, Rockport, IN: NPDES IN0059650 discharge permit, effluent exceedances, inspections, penalties

CLEVELAND-CLIFFS STEEL CORP. - ROCKPORT WORKS, Rockport, Indiana: Individual permit IN0059650, held by AK STEEL CORP. - ROCKPORT WORKS; Administratively continued; issued May 11, 2016, term to June 30, 2021, by IDEM; discharges to OHIO RIVER.

2 of the 22 pollutants listed for NPDES IN0059650 have no violation or effluent exceedance.

  • Chromium, hexavalent dissolved [as Cr]: 4 limits, 27 violations of any kind, 21 effluent exceedances, latest February 28, 2019, largest 14,186% over the limit.
  • Chromium, total [as Cr]: 0 limits, 16 violations of any kind, 12 effluent exceedances, latest February 29, 2008, largest 647% over the limit.
  • Nickel, total recoverable: 8 limits, 14 violations of any kind, 10 effluent exceedances, latest February 28, 2005, largest 465% over the limit.
  • Solids, total suspended: 8 limits, 13 violations of any kind, 5 effluent exceedances, latest April 30, 2018, largest 348% over the limit.
  • Oil & Grease: 0 limits, 23 violations of any kind, 3 effluent exceedances, latest June 30, 2000, largest 93% over the limit.
  • Zinc, total recoverable: 8 limits, 7 violations of any kind, 3 effluent exceedances, latest July 31, 1998, largest 381% over the limit.
  • Chlorine, total residual: 4 limits, 7 violations of any kind, 3 effluent exceedances, latest August 31, 1999, largest 433% over the limit.
  • Chromium, total recoverable: 8 limits, 3 violations of any kind, 3 effluent exceedances, latest May 31, 2025, largest 93% over the limit.
  • pH: 4 limits, 10 violations of any kind, 2 effluent exceedances, latest December 31, 1998.
  • Lead, total recoverable: 8 limits, 4 violations of any kind, 2 effluent exceedances, latest June 30, 2005, largest 525% over the limit.
  • LC50 Static Renewal 96Hr Acute Pimephales promelas: 0 limits, 2 violations of any kind, 2 effluent exceedances, latest September 30, 2006, largest 50% over the limit.
  • Iron, total recoverable: 0 limits, 9 violations of any kind, 1 effluent exceedance, latest February 28, 2005, largest 318% over the limit.
  • Oxidants, total residual: 0 limits, 2 violations of any kind, 1 effluent exceedance, latest June 30, 2005, largest 4% over the limit.
  • Betz clam-trol CT-2: 0 limits, 2 violations of any kind, 1 effluent exceedance, latest May 31, 2001, largest 4% over the limit.
  • Flow, in conduit or thru treatment plant: 8 limits, 8 violations of any kind.
  • Nitrogen, ammonia total [as N]: 4 limits, 8 violations of any kind.
  • Chloride [as Cl]: 4 limits, 8 violations of any kind.
  • Mercury, total recoverable: 0 limits, 8 violations of any kind.
  • Iron, total [as Fe]: 0 limits, 4 violations of any kind.
  • Temperature, water deg. fahrenheit: 2 limits, 2 violations of any kind.
  • Oil and grease, hexane extr method: 10 limits.
  • Flow, total: 2 limits.
  • June 18, 2026: Evaluation (S).
  • June 18, 2026: Evaluation (S).

CLEVELAND-CLIFFS STEEL CORP. - ROCKPORT WORKS among its neighbors

3 discharge permits are in the Sandy Creek subwatershed (HUC 051402010702); IN0059650 is one. Its county: 30, 3 major; IN0059650 is major permit.

Other permits in the Sandy Creek subwatershed (HUC 051402010702)

Identity

FacilityCLEVELAND-CLIFFS STEEL CORP. - ROCKPORT WORKS
PermitteeAK STEEL CORP. - ROCKPORT WORKS
NPDES IDIN0059650
StatusAdministratively continued
TypeIndividual permit
ClassMajor
Facility typeNon-POTW
IssuedMay 11, 2016
ExpiresJune 30, 2021
AgencyIDEM
AddressRockport, IN 47635
Receiving waterOHIO RIVER
Receiving water impaired303(D) Listed
SubwatershedSandy Creek (HUC 051402010702)
Other EPA IDs (FRS)RCRA handler INR000010397; ICIS-AIR source IN0000001814700041

NPDES IN0059650: effluent limits and exceedances

CLEVELAND-CLIFFS STEEL CORP. - ROCKPORT WORKS (NPDES IN0059650): 22 pollutants on file, 14 limited; 20 with a violation of any kind, 14 with an exceedance.

How exceedances are counted.

PollutantLimitsViolationsExceedancesLatestLargest, as filed
Chromium, hexavalent dissolved [as Cr]42721February 28, 201914,186% over the limit
Chromium, total [as Cr]01612February 29, 2008647% over the limit
Nickel, total recoverable81410February 28, 2005465% over the limit
Solids, total suspended8135April 30, 2018348% over the limit
Oil & Grease0233June 30, 200093% over the limit
Zinc, total recoverable873July 31, 1998381% over the limit
Chlorine, total residual473August 31, 1999433% over the limit
Chromium, total recoverable833May 31, 202593% over the limit
pH4102December 31, 1998
Lead, total recoverable842June 30, 2005525% over the limit
LC50 Static Renewal 96Hr Acute Pimephales promelas022September 30, 200650% over the limit
Iron, total recoverable091February 28, 2005318% over the limit
Oxidants, total residual021June 30, 20054% over the limit
Betz clam-trol CT-2021May 31, 20014% over the limit
Flow, in conduit or thru treatment plant880
Nitrogen, ammonia total [as N]480
Chloride [as Cl]480
Mercury, total recoverable080
Iron, total [as Fe]040
Temperature, water deg. fahrenheit220
Oil and grease, hexane extr method1000
Flow, total200

NPDES IN0059650: inspections, violations and enforcement

NPDES IN0059650: 2 inspections

DateWhat EPA recordedAgency
June 18, 2026EvaluationS
June 18, 2026EvaluationS

NPDES IN0059650 (CLEVELAND-CLIFFS STEEL CORP. - ROCKPORT WORKS): no single-event violation, formal enforcement action and informal enforcement action on file.

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Permits near NPDES IN0059650

NPDES IN0059650: 22 pollutant rows, 2 dated events; ICIS-NPDES download, loaded September 15, 2026.