STEEL DYNAMICS COLUMBUS LLC

NPDES permit MS0059994 · Minor NON-POTW · effective, expires 2027-03-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

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

0values over a limit
0required values missing, on 0 form(s)
0of 34 forms filed late

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

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 (54)

OutfallParameterStatisticLimitMonths
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU 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
002pHDAILY MN >= 6 SU all year
002pHDAILY MX <= 9 SU all year
002Flow, in conduit or thru treatment plantANNL AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
101pHDAILY MN >= 6 SU all year
101pHDAILY MX <= 9 SU all year
101Solids, total suspendedMO AVG report only all year
101Solids, total suspendedDAILY MX report only all year
101Solids, total suspendedMO AVG <= 599 lb/d all year
101Solids, total suspendedDAILY MX <= 1531 lb/d all year
101Oil & GreaseMO AVG report only all year
101Oil & GreaseDAILY MX report only all year
101Oil & GreaseMO AVG <= 104 lb/d all year
101Oil & GreaseDAILY MX <= 400 lb/d all year
101Iron, total recoverableMO AVG report only all year
101Iron, total recoverableDAILY MX report only all year
101Iron, total recoverableMO AVG <= 25.7 lb/d all year
101Iron, total recoverableDAILY MX <= 51.3 lb/d all year
101Zinc, total recoverableMO AVG report only all year
101Zinc, total recoverableDAILY MX report only all year
101Zinc, total recoverableMO AVG <= 5.4 lb/d all year
101Zinc, total recoverableDAILY MX <= 16.2 lb/d all year
101Lead, total recoverableMO AVG report only all year
101Lead, total recoverableDAILY MX report only all year
101Lead, total recoverableMO AVG <= 3.7 lb/d all year
101Lead, total recoverableDAILY MX <= 11 lb/d all year
101Chromium, total recoverableMO AVG report only all year
101Chromium, total recoverableDAILY MX report only all year
101Chromium, total recoverableMO AVG <= .064 lb/d all year
101Chromium, total recoverableDAILY MX <= .156 lb/d all year
101Copper, total recoverableMO AVG report only all year
101Copper, total recoverableDAILY MX report only all year
101Copper, total recoverableMO AVG <= .226 lb/d all year
101Copper, total recoverableDAILY MX <= .474 lb/d all year
101TetrachloroethyleneMO AVG report only all year
101TetrachloroethyleneDAILY MX report only all year
101TetrachloroethyleneMO AVG report only all year
101TetrachloroethyleneDAILY MX <= .0732 lb/d all year
101NaphthaleneMO AVG report only all year
101NaphthaleneDAILY MX report only all year
101NaphthaleneMO AVG report only all year
101NaphthaleneDAILY MX <= .0488 lb/d 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
101Cyanide, total recoverableMO AVG report only all year
101Cyanide, total recoverableDAILY MX report only all year
101Cyanide, total recoverableMO AVG <= .035 lb/d all year
101Cyanide, total recoverableDAILY MX <= .087 lb/d all year
102pHMINIMUM >= 7.5 SU all year
102pHMAXIMUM <= 9 SU 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