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Ssab Iowa Inc.

Blast Furnaces And Steel Mills, Muscatine, Iowa. NPDES permit IA0074101, in force until Apr 30, 2031. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (6 values), outfall 101 form A monthly (10 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 24 reports late

Limits in force (16)

ParameterStatisticLimitMonthsOutfall
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspended30-day average≤ 30 mg/Lall year001
Solids, total suspendeddaily maximum≤ 45 mg/Lall year001
Oil & Grease30-day average≤ 10 mg/Lall year001
Oil & Greasedaily maximum≤ 15 mg/Lall year001
pHdaily minimum≥ 6 SUall year101
pHdaily maximum≤ 9 SUall year101
Solids, total suspended30-day average≤ 93 lb/dall year101
Solids, total suspendeddaily maximum≤ 251 lb/dall year101
Oil & Grease30-day average≤ 21 lb/dall year101
Oil & Greasedaily maximum≤ 72 lb/dall year101
Lead, total [as Pb]30-day average≤ .022 lb/dall year101
Lead, total [as Pb]daily maximum≤ .67 lb/dall year101
Zinc, total [as Zn]30-day average≤ .34 lb/dall year101
Zinc, total [as Zn]daily maximum≤ 1.01 lb/dall year101

How strict are these limits?

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

Same industry: the 7 Primary Metal Industries permits in Iowa.

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/IA0074101 · MCP: https://passage-data.com/mcp