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Clean Water Act discharge permit · NPDES IN0000337

US STEEL CORP MIDWEST PLANT, Portage, IN: NPDES IN0000337 discharge permit, effluent exceedances, inspections, penalties

US STEEL CORP MIDWEST PLANT, held by US STEEL CORP, MIDWEST PLANT, holds NPDES permit IN0000337, which discharges to Burns Ditch To Lake Michigan. EPA’s file records it issued March 30, 2016 and expiring March 31, 2021. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filedUS STEEL CORP MIDWEST PLANT
Permittee as filedUS STEEL CORP, MIDWEST PLANT
NPDES IDIN0000337
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMajor discharger
Facility typeNot a publicly owned treatment works
IssuedMarch 30, 2016
Expiration dateMarch 31, 2021
Issuing agencyIDEM
AddressPortage, IN 46368
Receiving waterBURNS DITCH TO LAKE MICHIGAN
Receiving water impaired303(D) Listed
SubwatershedWillow Creek-Burns Ditch (HUC 040400010509)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Iron, total [as Fe]05858May 31, 2004492% over the limit
Temperature, water deg. fahrenheit268343February 29, 202423% over the limit
Solids, total suspended142016February 29, 2000303% over the limit
LC50 Static Renewal 96Hr Acute Pimephales promelas11212November 30, 200998% over the limit
LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia11010November 30, 2009100% over the limit
Toxicity [chronic], Ceriodaphnia dubia5179October 31, 202399,999% over the limit
Cyanide, total [as CN]12149October 31, 1998630% over the limit
Oil & Grease099June 30, 20091,022% over the limit
Noel Statre 7Day Chronic Pimephales188May 31, 201199,999% over the limit
BOD, 5-day, 20 deg. C088February 28, 1998121% over the limit
pH677February 28, 2015
Chlorine, total residual1266August 31, 1998220% over the limit
NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia155September 30, 201399,999% over the limit
Chromium, hexavalent [as Cr]055June 30, 1998827% over the limit
Chromium, total recoverable2084October 31, 2017580% over the limit
Chromium, hexavalent dissolved [as Cr]2084October 31, 2019176,920% over the limit
Copper, total recoverable1684November 30, 202048% over the limit
Chromium, total [as Cr]044May 31, 2000287% over the limit
Toxicity [acute], Ceriodaphnia dubia5113October 31, 2020520% over the limit
Fluoride, total [as F]1273September 30, 199440% over the limit
Lead, total [as Pb]022July 31, 19985% over the limit
Toxicity [chronic], Pimephales promelas [Fathead Minnow]591May 31, 2011693% over the limit
Temp. diff. between up/down stream deg. F161November 30, 20214% over the limit
Oil and grease, hexane extr method1241March 31, 201511% over the limit
Cyanide, weak acid, dissociable411December 31, 202031% over the limit
Coliform, fecal general011August 31, 1998500% over the limit
Silver total recoverable16100
Nickel, total recoverable2080
Toxicity [acute], Pimephales promelas [Fathead Minnow]580
Lead, total recoverable2040
Cadmium, total recoverable1640
Zinc, total recoverable1440
Tetrachloroethylene930
Flow, in conduit or thru treatment plant1220
Naphthalene620
Total toxic organics [TTO] [40 CFR433]620
Storm water flow020
Mercury, total recoverable410
Flow, total300
Nitrogen, ammonia total [as N]200
Chemical Oxygen Demand [COD]200
Temperature rise, length of excursion100
Temperature, length of excursion100
Month excursion time [min]100

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES IN0000337.

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

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How we handle your data → Privacy

EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID IN0000337 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.