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Nucor Steel Marion

Blast Furnaces And Steel Mills, Marion, Ohio. NPDES permit OH0138789, in force until Aug 31, 2028. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 001 form A monthly (25 values), outfall 006 form A monthly (19 values)
Renewal application due
Mar 4, 2028 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 24 reports late

Limits in force (44)

ParameterStatisticLimitMonthsOutfall
pHdaily minimum≥ 6.5 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Oil and grease, hexane extr methoddaily maximum≤ 10 mg/Lall year001
Iron, total recoverablemonthly averagereport only (ug/L)all year001
Iron, total recoverabledaily maximumreport only (ug/L)all year001
Nickel, total recoverablemonthly averagereport only (ug/L)all year001
Nickel, total recoverabledaily maximumreport only (ug/L)all year001
Zinc, total recoverablemonthly averagereport only (ug/L)all year001
Zinc, total recoverabledaily maximumreport only (ug/L)all year001
Aluminum, total recoverablemonthly averagereport only (ug/L)all year001
Aluminum, total recoverabledaily maximumreport only (ug/L)all year001
Cadmium, total recoverablemonthly averagereport only (ug/L)all year001
Cadmium, total recoverabledaily maximumreport only (ug/L)all year001
Lead, total recoverablemonthly averagereport only (ug/L)all year001
Lead, total recoverabledaily maximumreport only (ug/L)all year001
Chromium, total recoverablemonthly averagereport only (ug/L)all year001
Chromium, total recoverabledaily maximumreport only (ug/L)all year001
Copper, total recoverablemonthly averagereport only (ug/L)all year001
Copper, total recoverabledaily maximumreport only (ug/L)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Mercury, total low levelmonthly average≤ 12 ng/Lall year001
Mercury, total low leveldaily maximum≤ 1700 ng/Lall year001
pHdaily minimum≥ 6.5 SUall year006
pHdaily maximum≤ 9 SUall year006
Solids, total suspendedmonthly average≤ 30 mg/Lall year006
Solids, total suspendeddaily maximum≤ 45 mg/Lall year006
Oil and grease, hexane extr methoddaily maximum≤ 10 mg/Lall year006
Iron, total recoverablemonthly averagereport only (ug/L)all year006
Iron, total recoverabledaily maximumreport only (ug/L)all year006
Nickel, total recoverablemonthly averagereport only (ug/L)all year006
Nickel, total recoverabledaily maximumreport only (ug/L)all year006
Cadmium, total recoverablemonthly averagereport only (ug/L)all year006
Cadmium, total recoverabledaily maximumreport only (ug/L)all year006
Lead, total recoverabledaily maximum≤ 490 ug/Lall year006
Chromium, total recoverablemonthly averagereport only (ug/L)all year006
Chromium, total recoverabledaily maximumreport only (ug/L)all year006
Copper, total recoverabledaily maximum≤ 39 ug/Lall year006
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year006
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year006
Mercury, total low levelmonthly average≤ 12 ng/Lall year006
Mercury, total low leveldaily maximum≤ 1700 ng/Lall year006

How strict are these limits?

Cited limits by parameter: Ohio's rules and the federal ones.

Same industry: the 56 Primary Metal Industries permits in Ohio.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OH0138789 · MCP: https://passage-data.com/mcp