STEEL DYNAMICS, INC. - FLAT ROLL GROUP, BUTLER DIVISION

NPDES permit IN0059021 · Minor NON-POTW · effective, expires 2029-12-31 · EPA's file as of 2026-09-19

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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

9values over a limit
0required values missing, on 0 form(s)
1of 39 forms filed late

Last period with anything received: 2026-07-31. Most often over: Toxicity [chronic], Ceriodaphnia dubia (4), pH (3), Zinc, total recoverable (2).

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (96)

OutfallParameterStatisticLimitMonths
002pHDAILY MN >= 6 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 AV MN report only all year
002Solids, total suspendedDAILY MX report only all year
002Oil and grease, hexane extr methodMO AVG <= 10 mg/L all year
002Oil and grease, hexane extr methodDAILY MX <= 15 mg/L all year
002Oil and grease, hexane extr methodMO AVG report only all year
002Oil and grease, hexane extr methodDAILY MX report only all year
002Sulfate, total [as SO4]MO AVG report only all year
002Sulfate, total [as SO4]MO AVG report only (alert) all year
002Sulfate, total [as SO4]DAILY MX report only all year
002Sulfate, total [as SO4]DAILY MX report only (alert) all year
002Sulfate, total [as SO4]MO AVG report only all year
002Sulfate, total [as SO4]MO AVG report only (alert) all year
002Sulfate, total [as SO4]DAILY MX report only all year
002Sulfate, total [as SO4]DAILY MX report only (alert) all year
002Zinc, total recoverableMO AVG <= .22 mg/L all year
002Zinc, total recoverableMO AVG <= .27 mg/L all year
002Zinc, total recoverableDAILY MX <= .39 mg/L all year
002Zinc, total recoverableDAILY MX <= .47 mg/L all year
002Zinc, total recoverableMO AVG <= 2 lb/d all year
002Zinc, total recoverableMO AVG <= 1.4 lb/d all year
002Zinc, total recoverableDAILY MX <= 3.6 lb/d all year
002Zinc, total recoverableDAILY MX <= 2.4 lb/d all year
002Lead, total recoverableMO AVG report only all year
002Lead, total recoverableMO AVG report only (alert) all year
002Lead, total recoverableDAILY MX report only all year
002Lead, total recoverableDAILY MX report only (alert) all year
002Lead, total recoverableMO AVG report only all year
002Lead, total recoverableMO AVG report only (alert) all year
002Lead, total recoverableDAILY MX report only all year
002Lead, total recoverableDAILY MX report only (alert) 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, totalMO TOTAL report only all year
003pHDAILY MN >= 6 SU all year
003pHDAILY MX <= 9 SU all year
003Solids, total suspendedMO AVG report only all year
003Solids, total suspendedDAILY MX report only all year
003Solids, total suspendedMO AVG report only all year
003Solids, total suspendedDAILY MX report only all year
003Oil and grease, hexane extr methodMO AVG <= 10 mg/L all year
003Oil and grease, hexane extr methodDAILY MX <= 15 mg/L all year
003Oil and grease, hexane extr methodMO AVG report only all year
003Oil and grease, hexane extr methodDAILY MX report only all year
003Zinc, total recoverableMO AVG report only all year
003Zinc, total recoverableMO AVG report only all year
003Zinc, total recoverableDAILY MX report only all year
003Zinc, total recoverableDAILY MX report only all year
003Zinc, total recoverableMO AVG report only all year
003Zinc, total recoverableMO AVG report only all year
003Zinc, total recoverableDAILY MX report only all year
003Zinc, total recoverableDAILY MX report only all year
003Flow, in conduit or thru treatment plantMO AVG report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
003Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 1 tox acute Jan, Jul
003Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 1 tox acute Jan, Jul
003Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 1 tox acute Feb, Aug
003Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 1 tox acute Feb, Aug
003Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 1.2 tox chronic Jan, Jul
003Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 1.2 tox chronic Jan, Jul
003Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 1.2 tox chronic Feb, Aug
003Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 1.2 tox chronic Feb, Aug
003Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox acute Jan, Jul
003Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox acute Jan, Jul
003Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox acute Feb, Aug
003Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox acute Feb, Aug
003Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1.2 tox chronic Jan, Jul
003Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1.2 tox chronic Jan, Jul
003Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1.2 tox chronic Feb, Aug
003Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1.2 tox chronic Feb, Aug
003Flow, totalMO TOTAL report only all year
005pHDAILY MN >= 6 SU all year
005pHDAILY MX <= 9 SU all year
005Solids, total suspendedDAILY MX report only Dec
005Oil and grease, hexane extr methodMO AVG <= 10 mg/L all year
005Oil and grease, hexane extr methodDAILY MX <= 15 mg/L all year
005Oil and grease, hexane extr methodMO AVG report only all year
005Oil and grease, hexane extr methodDAILY MX report only all year
005Nitrogen, Kjeldahl, total [as N]DAILY MX report only Dec
005Nitrite + Nitrate total [as N]DAILY MX report only Dec
005Phosphorus, total [as P]DAILY MX report only Dec
005Zinc, total recoverableMO AVG report only all year
005Zinc, total recoverableMO AVG report only (alert) all year
005Zinc, total recoverableDAILY MX report only all year
005Zinc, total recoverableDAILY MX report only (alert) all year
005Zinc, total recoverableMO AVG report only all year
005Zinc, total recoverableMO AVG report only (alert) all year
005Zinc, total recoverableDAILY MX report only all year
005Zinc, total recoverableDAILY MX report only (alert) all year
005BOD, carbonaceous [5 day, 20 C]DAILY MX report only Dec
005Chemical Oxygen Demand [COD]DAILY MX report only Dec
005Storm water flowMO AVG report only all year
005Storm water flowDAILY MX report only all year

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