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Gerdau Specialty Steel North America

Blast Furnaces And Steel Mills, Jackson, Michigan. NPDES permit MI0028461 expired Oct 1, 2017; its limits still apply. Last 12 months: over a limit 2 times (last July 2026), 86 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 21 days after each period: outfall 001 form A monthly (3 values), outfall 001 form B monthly (6 values), outfall 002 form A monthly (12 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 44 required values missing, 0 of 36 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
November 2025Chlorine, total residual, daily maximum50≤ 38 ug/L32%
July 2026Chlorine, total residual, daily maximum40≤ 38 ug/L5%

Limits in force (49)

ParameterStatisticLimitMonthsOutfall
pHdaily minimum≥ 6.5 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 20 mg/LJan, Apr, Jul, Oct001
Solids, total suspendeddaily maximum≤ 40 mg/LJan, Apr, Jul, Oct001
Solids, total suspendedmonthly average≤ 25 lb/dJan, Apr, Jul, Oct001
Solids, total suspendeddaily maximum≤ 50 lb/dJan, Apr, Jul, Oct001
Oil & Greasedaily maximum≤ 10 mg/LJan, Apr, Jul, Oct001
Lead, total [as Pb]maximum monthly average≤ .28 lb/dJan, Apr, Jul, Oct001
Lead, total [as Pb]monthly average≤ .28 lb/dJan, Apr, Jul, Oct001
Lead, total [as Pb]daily maximum≤ .84 lb/dJan, Apr, Jul, Oct001
Lead, total [as Pb]daily maximum≤ .84 lb/dJan, Apr, Jul, Oct001
Zinc, total [as Zn]maximum monthly average≤ .42 lb/dJan, Apr, Jul, Oct001
Zinc, total [as Zn]monthly average≤ .42 lb/dJan, Apr, Jul, Oct001
Zinc, total [as Zn]daily maximum≤ 1.3 lb/dJan, Apr, Jul, Oct001
Zinc, total [as Zn]daily maximum≤ 1.3 lb/dJan, Apr, Jul, Oct001
Toxicity, choice of speciesmonthly average≤ 1 tox chronicall year001
Toxicity, choice of speciesdaily maximumreport only (tox chronic)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
Chlorine, total residualdaily maximum≤ 38 ug/Lall year001
Toxicity [acute], Ceriodaphnia dubiadaily maximumreport only (tox acute)all year001
Mercury, total [as Hg]monthly averagereport only (ng/L)Jan, Apr, Jul, Oct001
Mercury, total [as Hg]daily maximumreport only (ng/L)Jan, Apr, Jul, Oct001
Mercury, total [as Hg]monthly averagereport only (lb/d)Jan, Apr, Jul, Oct001
Mercury, total [as Hg]daily maximumreport only (lb/d)Jan, Apr, Jul, Oct001
Mercury, total [as Hg]12-month average≤ 3 ng/LJan, Apr, Jul, Oct001
Mercury, total [as Hg]12-month average≤ .0000038 lb/dJan, Apr, Jul, Oct001
Outfall observation,visual, y/n responsevaluereport only (N=0;Y=1)all year001
pHdaily minimum≥ 6.5 SUall year002
pHdaily maximum≤ 9 SUall year002
Solids, total suspendedmonthly averagereport only (mg/L)all year002
Solids, total suspendeddaily maximumreport only (mg/L)all year002
Barium, total [as Ba]daily maximumreport only (ug/L)Jan, Apr, Jul, Oct002
Copper, total [as Cu]monthly average≤ 28 ug/Lall year002
Copper, total [as Cu]daily maximum≤ 92 ug/Lall year002
Copper, total [as Cu]monthly average≤ .034 lb/dall year002
Copper, total [as Cu]daily maximum≤ .11 lb/dall year002
Lead, total [as Pb]daily maximumreport only (ug/L)Jan, Apr, Jul, Oct002
Molybdenum, total [as Mo]monthly average≤ 3200 ug/Lall year002
Molybdenum, total [as Mo]daily maximumreport only (ug/L)all year002
Molybdenum, total [as Mo]monthly average≤ 3.8 lb/dall year002
Molybdenum, total [as Mo]daily maximumreport only (lb/d)all year002
Zinc, total [as Zn]monthly average≤ 520 ug/Lall year002
Zinc, total [as Zn]daily maximum≤ 1000 ug/Lall year002
Zinc, total [as Zn]monthly average≤ .63 lb/dall year002
Zinc, total [as Zn]daily maximum≤ 1.2 lb/dall year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
Outfall observation,visual, y/n responsevaluereport only (N=0;Y=1)all year002

How strict are these limits?

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

Same industry: the 9 Primary Metal Industries permits in Michigan.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MI0028461 · MCP: https://passage-data.com/mcp