AK Steel Corporation

NPDES permit MI0043524 · Major NON-POTW · administratively continued, expires 2016-10-01 · 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.

This permit expired on 2016-10-01 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

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

0values over a limit
0required values missing, on 0 form(s)
0of 132 forms filed late

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

Reporting

Reports are due about 21 days after each monitoring period ends (the most common figure among MI permits in EPA's filings — check your permit).

Limits in force (236)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitMO AVG report only all year
001Temperature, water deg. fahrenheitDAILY MX report only all year
001Oxygen, dissolved [DO]DAILY MN report only May, Jun, Jul, Aug, Sep
001pHDAILY MN >= 6.5 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedDAILY MX <= 12100 lb/d all year
001Solids, total suspendedMO AVG <= 4700 lb/d all year
001Solids, total suspendedDAILY MX report only all year
001Oil & GreaseMO AVG report only all year
001Oil & GreaseDAILY MX report only all year
001Oil & GreaseMO AVG report only all year
001Oil & GreaseDAILY MX <= 3300 lb/d all year
001Cadmium, total [as Cd]DAILY MX report only all year
001Cadmium, total [as Cd]DAILY MX report only all year
001Copper, total [as Cu]MO AVG report only all year
001Copper, total [as Cu]DAILY MX report only all year
001Copper, total [as Cu]MO AVG report only all year
001Copper, total [as Cu]DAILY MX report only all year
001Lead, total [as Pb]MO AVG <= 10 ug/L all year
001Lead, total [as Pb]DAILY MX report only all year
001Lead, total [as Pb]MO AVG <= 5.7 lb/d all year
001Lead, total [as Pb]DAILY MX <= 17 lb/d all year
001Silver, total [as Ag]MO AVG report only all year
001Silver, total [as Ag]DAILY MX report only all year
001Silver, total [as Ag]MO AVG report only all year
001Silver, total [as Ag]DAILY MX report only all year
001Zinc, total [as Zn]MO AVG report only all year
001Zinc, total [as Zn]DAILY MX report only all year
001Zinc, total [as Zn]MO AVG report only all year
001Zinc, total [as Zn]DAILY MX report only all year
001Zinc, total [as Zn]MO AVG report only all year
001Zinc, total [as Zn]DAILY MX report only all year
001Zinc, total [as Zn]MO AVG report only all year
001Zinc, total [as Zn]DAILY MX report only all year
001Zinc, total [as Zn]MO AVG report only all year
001Zinc, total [as Zn]DAILY MN report only all year
001Zinc, total [as Zn]MO AVG <= 9 lb/d all year
001Zinc, total [as Zn]DAILY MX <= 25 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 residualDAILY MX report only all year
001Mercury, total [as Hg]MO AVG report only Jan, Apr, Jul, Oct
001Mercury, total [as Hg]DAILY MX report only Jan, Apr, Jul, Oct
001Mercury, total [as Hg]MO AVG report only Jan, Apr, Jul, Oct
001Mercury, total [as Hg]DAILY MX report only Jan, Apr, Jul, Oct
001Mercury, total [as Hg]1D <= 4 ng/L Jan, Apr, Jul, Oct
001Mercury, total [as Hg]1D <= .0034 lb/d Jan, Apr, Jul, Oct
001Outfall observation,visual, y/n responseVALUE report only all year
002Temperature, water deg. fahrenheitMO AVG report only all year
002Temperature, water deg. fahrenheitDAILY MX report only all year
002Oxygen, dissolved [DO]DAILY MN report only May, Jun, Jul, Aug, Sep
002pHDAILY MN >= 6.5 SU all year
002pHDAILY MX <= 9 SU all year
002Solids, total suspendedMO AVG report only all year
002Solids, total suspendedDAILY MX report only all year
002Solids, total suspendedMO AVG report only all year
002Solids, total suspendedMO AVG <= 700 lb/d all year
002Solids, total suspendedMO AVG <= 47 lb/d all year
002Solids, total suspendedDAILY MX report only all year
002Solids, total suspendedDAILY MX <= 1850 lb/d all year
002Solids, total suspendedDAILY MX <= 130 lb/d all year
002Oil & GreaseDAILY MX report only all year
002Oil & GreaseMO AVG <= 160 lb/d all year
002Oil & GreaseDAILY MX <= 490 lb/d all year
002Oil & GreaseDAILY MX report only all year
002Lead, total [as Pb]MO AVG <= .6 lb/d all year
002Lead, total [as Pb]MO AVG <= .62 lb/d all year
002Lead, total [as Pb]DAILY MX <= 1.7 lb/d all year
002Lead, total [as Pb]DAILY MX <= 1.9 lb/d all year
002Silver, total [as Ag]MO AVG <= 1.1 ug/L all year
002Silver, total [as Ag]DAILY MX report only all year
002Silver, total [as Ag]MO AVG <= .13 lb/d all year
002Silver, total [as Ag]DAILY MX report only all year
002Zinc, total [as Zn]MO AVG <= .84 lb/d all year
002Zinc, total [as Zn]MO AVG <= .93 lb/d all year
002Zinc, total [as Zn]DAILY MX <= 2.5 lb/d all year
002Zinc, total [as Zn]DAILY MX <= 2.8 lb/d all year
002Cyanide [A]MO AVG report only all year
002Cyanide [A]DAILY MX report only all year
002Cyanide [A]MO AVG report only all year
002Cyanide [A]DAILY MX report only all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Chlorine, total residualDAILY MX report only all year
002Production divided by days operated mo.MO AVG report only all year
002Production divided by days operated mo.DAILY MX report only all year
002Mercury, total [as Hg]MO AVG report only Jan, Apr, Jul, Oct
002Mercury, total [as Hg]DAILY MX report only Jan, Apr, Jul, Oct
002Mercury, total [as Hg]MO AVG report only Jan, Apr, Jul, Oct
002Mercury, total [as Hg]DAILY MX report only Jan, Apr, Jul, Oct
002Mercury, total [as Hg]1D <= 4 ng/L all year
002Mercury, total [as Hg]1D <= .00047 lb/d all year
002Outfall observation,visual, y/n responseVALUE report only all year
004Temperature, water deg. fahrenheitMO AVG report only all year
004Temperature, water deg. fahrenheitMO AVG report only all year
004Temperature, water deg. fahrenheitMO AVG report only all year
004Temperature, water deg. fahrenheitMO AVG report only all year
004Temperature, water deg. fahrenheitDAILY MX report only all year
004Temperature, water deg. fahrenheitDAILY MX report only all year
004Temperature, water deg. fahrenheitDAILY MX report only all year
004Temperature, water deg. fahrenheitDAILY MX report only all year
004Oxygen, dissolved [DO]DAILY MN report only May, Jun, Jul, Aug, Sep
004pHDAILY MN >= 6.5 SU all year
004pHDAILY MN >= 6.5 SU all year
004pHDAILY MN >= 6.5 SU all year
004pHDAILY MN >= 6.5 SU all year
004pHDAILY MX <= 9 SU all year
004pHDAILY MX <= 9 SU all year
004pHDAILY MX <= 9 SU all year
004pHDAILY MX <= 9 SU all year
004Solids, total suspendedMO AVG <= 30 mg/L all year
004Solids, total suspendedDAILY MX <= 70 mg/L all year
004Solids, total suspendedMO AVG <= 13 lb/d all year
004Solids, total suspendedMO AVG <= 370 lb/d all year
004Solids, total suspendedDAILY MX <= 29 lb/d all year
004Solids, total suspendedDAILY MX <= 1100 lb/d all year
004Oil & GreaseDAILY MX report only all year
004Oil & GreaseDAILY MX report only all year
004Oil & GreaseDAILY MX report only all year
004Oil & GreaseDAILY MX report only all year
004Nitrogen, ammonia total [as N]DAILY MX report only all year
004Nitrogen, ammonia total [as N]MO AVG <= 190 lb/d all year
004Nitrogen, ammonia total [as N]DAILY MX <= 380 lb/d all year
004Cyanide, total [as CN]MO AVG <= 13 lb/d all year
004Cyanide, total [as CN]DAILY MX <= 25 lb/d all year
004Copper, total [as Cu]DAILY MX report only Jan, Apr, Jul, Oct
004Copper, total [as Cu]DAILY MX report only Jan, Apr, Jul, Oct
004Lead, total [as Pb]MO AVG <= 1.3 lb/d all year
004Lead, total [as Pb]DAILY MX <= 3.8 lb/d all year
004Thallium, total [as Tl]MO AVG <= 4.4 ug/L all year
004Thallium, total [as Tl]DAILY MX report only all year
004Thallium, total [as Tl]MO AVG <= 13 lb/d all year
004Thallium, total [as Tl]DAILY MX report only all year
004Zinc, total [as Zn]MO AVG <= 1.9 lb/d all year
004Zinc, total [as Zn]DAILY MX <= 5.7 lb/d all year
004Selenium, total [as Se]MO AVG <= 5.7 ug/L all year
004Selenium, total [as Se]DAILY MX report only all year
004Selenium, total [as Se]MO AVG <= 17 lb/d all year
004Selenium, total [as Se]DAILY MX report only all year
004Cyanide [A]MO AVG report only all year
004Cyanide [A]DAILY MX report only all year
004Cyanide [A]DAILY MX report only Jan, Apr, Jul, Oct
004Cyanide [A]DAILY MX report only all year
004Cyanide [A]MO AVG report only all year
004Cyanide [A]DAILY MX report only all year
004Cyanide [A]DAILY MX report only Jan, Apr, Jul, Oct
004Cyanide [A]DAILY MX report only all year
004Flow, in conduit or thru treatment plantMO AVG report only all year
004Flow, in conduit or thru treatment plantMO AVG report only all year
004Flow, in conduit or thru treatment plantMO AVG report only all year
004Flow, in conduit or thru treatment plantMO AVG report only all year
004Flow, in conduit or thru treatment plantMO AVG report only all year
004Flow, in conduit or thru treatment plantMO AVG report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
004Flow, in conduit or thru treatment plantMO AVG report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
004Chlorine, total residualDAILY MX report only all year
004Chlorine, total residualDAILY MX report only all year
004Chlorine, total residualDAILY MX report only all year
004Chlorine, total residualDAILY MX report only all year
004Chlorine, total residualDAILY MX <= 2.1 lb/d all year
004Production divided by days operated mo.MO AVG report only all year
004Production divided by days operated mo.DAILY MX report only all year
004Mercury, total [as Hg]MO AVG report only Jan, Apr, Jul, Oct
004Mercury, total [as Hg]MO AVG report only Jan, Apr, Jul, Oct
004Mercury, total [as Hg]MO AVG report only all year
004Mercury, total [as Hg]MO AVG report only all year
004Mercury, total [as Hg]DAILY MX report only Jan, Apr, Jul, Oct
004Mercury, total [as Hg]DAILY MX report only Jan, Apr, Jul, Oct
004Mercury, total [as Hg]DAILY MX report only all year
004Mercury, total [as Hg]DAILY MX report only all year
004Mercury, total [as Hg]MO AVG report only Jan, Apr, Jul, Oct
004Mercury, total [as Hg]MO AVG report only Jan, Apr, Jul, Oct
004Mercury, total [as Hg]MO AVG report only all year
004Mercury, total [as Hg]MO AVG report only all year
004Mercury, total [as Hg]DAILY MX report only Jan, Apr, Jul, Oct
004Mercury, total [as Hg]DAILY MX report only Jan, Apr, Jul, Oct
004Mercury, total [as Hg]DAILY MX report only all year
004Mercury, total [as Hg]DAILY MX report only all year
004Mercury, total [as Hg]1D <= 7 ng/L all year
004Mercury, total [as Hg]1D <= 6 ng/L all year
004Mercury, total [as Hg]1D <= 5 ng/L Jan, Apr, Jul, Oct
004Mercury, total [as Hg]1D <= 5 ng/L Jan, Apr, Jul, Oct
004Mercury, total [as Hg]1D <= .0003 lb/d all year
004Mercury, total [as Hg]1D <= .017 lb/d all year
004Mercury, total [as Hg]1D <= .0013 lb/d Jan, Apr, Jul, Oct
004Mercury, total [as Hg]1D <= .0011 lb/d Jan, Apr, Jul, Oct
004Outfall observation,visual, y/n responseVALUE report only all year
004Outfall observation,visual, y/n responseVALUE report only all year
004Outfall observation,visual, y/n responseVALUE report only all year
004Outfall observation,visual, y/n responseVALUE report only all year
006Temperature, water deg. fahrenheitMO AVG report only all year
006Temperature, water deg. fahrenheitDAILY MX report only all year
006Oxygen, dissolved [DO]DAILY MN report only May, Jun, Jul, Aug, Sep
006pHDAILY MN >= 6.5 SU all year
006pHDAILY MX <= 9 SU all year
006Silver, total [as Ag]MO AVG <= .86 ug/L all year
006Silver, total [as Ag]DAILY MX report only all year
006Silver, total [as Ag]MO AVG <= 1.1 lb/d all year
006Silver, total [as Ag]DAILY MX report only all year
006Cyanide [A]MO AVG <= 6.2 ug/L all year
006Cyanide [A]DAILY MX report only all year
006Cyanide [A]MO AVG <= 7.7 lb/d all year
006Cyanide [A]DAILY MX report only all year
006NaphthaleneMO AVG <= 16 ug/L all year
006NaphthaleneDAILY MX report only all year
006NaphthaleneMO AVG <= 20 lb/d all year
006NaphthaleneDAILY MX report only all year
006Flow, in conduit or thru treatment plantMO AVG report only all year
006Flow, in conduit or thru treatment plantDAILY MX report only all year
006Chlorine, total residualDAILY MX report only all year
006Mercury, total [as Hg]MO AVG report only all year
006Mercury, total [as Hg]DAILY MX report only all year
006Mercury, total [as Hg]MO AVG report only all year
006Mercury, total [as Hg]DAILY MX report only all year
006Mercury, total [as Hg]1D <= 7 ng/L all year
006Mercury, total [as Hg]1D <= .009 lb/d all year
006Outfall observation,visual, y/n responseVALUE report only all year

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