CLEVELAND-CLIFFS STEEL LLC - CENTRAL TREATMENT PLANT

NPDES permit IN0063711 · Major NON-POTW · effective, expires 2029-01-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
0required values missing, on 0 form(s)
0of 48 forms filed late

Last period with anything received: 2026-07-31.

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among IN permits in EPA's filings — check your permit).

Limits in force (126)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitMO AVG report only all year
001Temperature, water deg. fahrenheitDAILY MX report only all year
001Temperature, water deg. fahrenheitMO AVG report only all year
001Temperature, water deg. fahrenheitDAILY MX report only all year
001pHDAILY MN >= 6 SU all year
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Solids, total suspendedDAILY MX report only all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Solids, total suspendedDAILY MX report only all year
001Oil and grease, hexane extr methodMO AVG <= 10 mg/L all year
001Oil and grease, hexane extr methodMO AVG <= 10 mg/L all year
001Oil and grease, hexane extr methodDAILY MX <= 15 mg/L all year
001Oil and grease, hexane extr methodDAILY MX <= 15 mg/L all year
001Oil and grease, hexane extr methodMO AVG report only all year
001Oil and grease, hexane extr methodMO AVG report only all year
001Oil and grease, hexane extr methodDAILY MX report only all year
001Oil and grease, hexane extr methodDAILY MX report only all year
001Cyanide, free [as free]MO AVG <= 22 ug/L all year
001Cyanide, free [as free]MO AVG report only all year
001Cyanide, free [as free]DAILY MX <= 44 ug/L all year
001Cyanide, free [as free]DAILY MX report only all year
001Cyanide, free [as free]MO AVG <= 1.6 lb/d all year
001Cyanide, free [as free]MO AVG report only all year
001Cyanide, free [as free]DAILY MX <= 3.1 lb/d all year
001Cyanide, free [as free]DAILY MX report only all year
001Zinc, total recoverableMO AVG <= .19 mg/L all year
001Zinc, total recoverableMO AVG report only all year
001Zinc, total recoverableDAILY MX <= .37 mg/L all year
001Zinc, total recoverableDAILY MX report only all year
001Zinc, total recoverableMO AVG <= 13 lb/d all year
001Zinc, total recoverableMO AVG report only all year
001Zinc, total recoverableDAILY MX <= 26 lb/d all year
001Zinc, total recoverableDAILY MX report only all year
001Copper, total recoverableMO AVG <= 23 ug/L all year
001Copper, total recoverableDAILY MX <= 46 ug/L all year
001Copper, total recoverableMO AVG <= 1.6 lb/d all year
001Copper, total recoverableDAILY MX <= 3.3 lb/d all year
001Chromium, hexavalent dissolved [as Cr]MO AVG <= 16 ug/L all year
001Chromium, hexavalent dissolved [as Cr]DAILY MX <= 31 ug/L all year
001Chromium, hexavalent dissolved [as Cr]MO AVG <= 1.1 lb/d all year
001Chromium, hexavalent dissolved [as Cr]DAILY MX <= 2.2 lb/d all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualMO AVG <= 16 ug/L all year
001Chlorine, total residualMO AVG <= 16 ug/L all year
001Chlorine, total residualDAILY MX < 60 ug/L all year
001Chlorine, total residualDAILY MX < 60 ug/L all year
001Chlorine, total residualMO AVG <= 1.1 lb/d all year
001Chlorine, total residualMO AVG <= 1.1 lb/d all year
001Chlorine, total residualDAILY MX < 4.3 lb/d all year
001Chlorine, total residualDAILY MX < 4.3 lb/d all year
001Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 1 tox acute Feb, May, Aug, Nov
001Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 7.9 tox chronic Feb, May, Aug, Nov
001Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox acute Feb, May, Aug, Nov
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 7.9 tox chronic Feb, May, Aug, Nov
001Mercury, total recoverableROLL AVG < 8.7 ng/L Feb, Apr, Jun, Aug, Oct, Dec
001Mercury, total recoverableROLL AVG <= 8.7 ng/L Feb, Apr, Jun, Aug, Oct, Dec
001Mercury, total recoverableDAILY MX report only Feb, Apr, Jun, Aug, Oct, Dec
001Mercury, total recoverableDAILY MX report only Feb, Apr, Jun, Aug, Oct, Dec
001Flow, totalMO TOTAL report only all year
001Flow, totalMO TOTAL report only all year
101Solids, total suspendedMO AVG report only all year
101Solids, total suspendedMO AVG report only all year
101Solids, total suspendedDAILY MX report only all year
101Solids, total suspendedDAILY MX report only all year
101Solids, total suspendedMO AVG <= 893 lb/d all year
101Solids, total suspendedMO AVG <= 278 lb/d all year
101Solids, total suspendedDAILY MX <= 1902 lb/d all year
101Solids, total suspendedDAILY MX <= 649 lb/d all year
101Oil and grease, hexane extr methodMO AVG report only all year
101Oil and grease, hexane extr methodMO AVG report only all year
101Oil and grease, hexane extr methodDAILY MX report only all year
101Oil and grease, hexane extr methodDAILY MX report only all year
101Oil and grease, hexane extr methodMO AVG <= 524 lb/d all year
101Oil and grease, hexane extr methodMO AVG <= 92.7 lb/d all year
101Oil and grease, hexane extr methodDAILY MX <= 1195 lb/d all year
101Oil and grease, hexane extr methodDAILY MX <= 278 lb/d all year
101Cyanide, total [as CN]MO AVG report only all year
101Cyanide, total [as CN]DAILY MX report only all year
101Cyanide, total [as CN]MO AVG <= 9.38 lb/d all year
101Cyanide, total [as CN]DAILY MX <= 17.3 lb/d all year
101Nickel, total recoverableMO AVG report only all year
101Nickel, total recoverableDAILY MX report only all year
101Nickel, total recoverableMO AVG <= 34.4 lb/d all year
101Nickel, total recoverableDAILY MX <= 57.5 lb/d all year
101Zinc, total recoverableMO AVG report only all year
101Zinc, total recoverableMO AVG report only all year
101Zinc, total recoverableDAILY MX report only all year
101Zinc, total recoverableDAILY MX report only all year
101Zinc, total recoverableMO AVG <= 23.9 lb/d all year
101Zinc, total recoverableMO AVG <= 1.85 lb/d all year
101Zinc, total recoverableDAILY MX <= 45.1 lb/d all year
101Zinc, total recoverableDAILY MX <= 5.56 lb/d all year
101Chromium, total recoverableMO AVG report only all year
101Chromium, total recoverableDAILY MX report only all year
101Chromium, total recoverableMO AVG <= 24.7 lb/d all year
101Chromium, total recoverableDAILY MX <= 40 lb/d all year
101Copper, total recoverableMO AVG report only all year
101Copper, total recoverableDAILY MX report only all year
101Copper, total recoverableMO AVG <= 29.9 lb/d all year
101Copper, total recoverableDAILY MX <= 48.8 lb/d all year
101Chromium, hexavalent dissolved [as Cr]MO AVG report only all year
101Chromium, hexavalent dissolved [as Cr]MO AVG report only all year
101Chromium, hexavalent dissolved [as Cr]DAILY MX report only all year
101Chromium, hexavalent dissolved [as Cr]DAILY MX report only all year
101Chromium, hexavalent dissolved [as Cr]MO AVG report only all year
101Chromium, hexavalent dissolved [as Cr]MO AVG report only all year
101Chromium, hexavalent dissolved [as Cr]DAILY MX report only all year
101Chromium, hexavalent dissolved [as Cr]DAILY MX report only all year
101Flow, in conduit or thru treatment plantMO AVG report only all year
101Flow, in conduit or thru treatment plantMO AVG report only all year
101Flow, in conduit or thru treatment plantDAILY MX report only all year
101Flow, in conduit or thru treatment plantDAILY MX report only all year
101Total toxic organics [TTO] [40 CFR433]DAILY MX report only Mar, Jun, Sep, Dec
101Total toxic organics [TTO] [40 CFR433]DAILY MX report only Mar, Jun, Sep, Dec
101Total toxic organics [TTO] [40 CFR433]DAILY MX <= 30.7 lb/d Mar, Jun, Sep, Dec
101Total toxic organics [TTO] [40 CFR433]DAILY MX <= 30.7 lb/d Mar, Jun, Sep, Dec

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states