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Oregon Steel Mills LLC

Blast Furnaces And Steel Mills, Portland, Oregon. NPDES permit OR0000451 expired Nov 30, 2014; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (7 values), form B monthly (15 values), form TX twice a year
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 26 reports late

Limits in force (23)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year
Temperature, water deg. fahrenheitmaximum 7-day averagereport only (deg F)all year
Turbiditydaily maximumreport only (NTU)all year
Turbiditydaily maximumreport only (NTU)all year
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedmonthly average≤ 532 lb/dall year
Solids, total suspendeddaily maximum≤ 1420 lb/dall year
Oil & Greasedaily maximum≤ 15 mg/Lall year
Zinc, total recoverablevaluereport only (mg/L)all year
Zinc, total recoverablemonthly average≤ .117 lb/dall year
Zinc, total recoverabledaily maximum≤ .35 lb/dall year
Lead, total recoverablevaluereport only (mg/L)all year
Lead, total recoverablemonthly average≤ .078 lb/dall year
Lead, total recoverabledaily maximum≤ .23 lb/dall year
Flow, in conduit or thru treatment plantvaluereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximum≤ .79 MGDall year
Chlorine, total residualmonthly average≤ .17 mg/Lall year
Chlorine, total residualdaily maximum≤ .34 mg/Lall year
Excess thermal load7-day average≤ 30 mkcal/dayMay–Oct
Solids, total dissolvedmonthly average≤ 1136 mg/Lall year
Report due [yrmoda]valuereport only (N=0;Y=1)all year

How strict are these limits?

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

Same industry: the 6 Primary Metal Industries permits in Oregon.

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/OR0000451 · MCP: https://passage-data.com/mcp