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Columbia Gorge Aluminum Company

Primary Aluminum, Goldendale, Washington. NPDES permit WA0000540 expired Apr 30, 2013; 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: outfall 001 form MM monthly (12 values), outfall 001B form MM monthly (12 values), outfall ANOD form MM monthly (1 value), outfall DCPT form MM monthly (1 value)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 3 required values missing, 4 of 48 reports late

Limits in force (52)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitmonthly averagereport only (deg F) (alert, not enforceable)all year001
Temperature, water deg. fahrenheitmonthly averagereport only (deg F) (alert, not enforceable)all year001
Solids, total suspendeddaily maximum≤ 411 lb/dall year001
Solids, total suspendeddaily maximum≤ 411 lb/dall year001
Solids, total suspendedmonthly average≤ 103 lb/dall year001
Solids, total suspendedmonthly average≤ 103 lb/dall year001
Oil and grease, hexane extr methodsingle readingreport only (lb/d) (alert, not enforceable)all year001
Oil and grease, hexane extr methodsingle readingreport only (lb/d) (alert, not enforceable)all year001
Fluoride, total [as F]daily maximum≤ 350 lb/dall year001
Fluoride, total [as F]daily maximum≤ 350 lb/dall year001
Fluoride, total [as F]monthly average≤ 160 lb/dall year001
Fluoride, total [as F]monthly average≤ 160 lb/dall year001
Aluminum, total [as Al]daily maximum≤ 40 lb/dall year001
Aluminum, total [as Al]daily maximum≤ 40 lb/dall year001
Aluminum, total [as Al]monthly average≤ 18 lb/dall year001
Aluminum, total [as Al]monthly average≤ 18 lb/dall year001
pH, maximumsingle readingreport only (SU) (alert, not enforceable)all year001
pH, maximumsingle readingreport only (SU) (alert, not enforceable)all year001
pH, minimumsingle readingreport only (SU) (alert, not enforceable)all year001
pH, minimumsingle readingreport only (SU) (alert, not enforceable)all year001
Flowdaily maximumreport only (MGD) (alert, not enforceable)all year001
Flowdaily maximumreport only (MGD) (alert, not enforceable)all year001
Flowmonthly averagereport only (MGD) (alert, not enforceable)all year001
Flowmonthly averagereport only (MGD) (alert, not enforceable)all year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001B
Solids, total suspendedmonthly average≤ 30 mg/Lall year001B
Solids, total suspendedweekly average≤ 45 mg/Lall year001B
Solids, total suspendedweekly average≤ 45 mg/Lall year001B
Chlorine, total residualmaximum≤ 2.5 mg/Lall year001B
Chlorine, total residualmaximum≤ 2.5 mg/Lall year001B
Chlorine, total residualminimum≥ .1 mg/Lall year001B
Chlorine, total residualminimum≥ .1 mg/Lall year001B
BOD, percent removal [total]monthly average minimum≥ 85 %all year001B
BOD, percent removal [total]monthly average minimum≥ 85 %all year001B
pH, maximumsingle readingreport only (SU) (alert, not enforceable)all year001B
pH, maximumsingle readingreport only (SU) (alert, not enforceable)all year001B
pH, minimumsingle readingreport only (SU) (alert, not enforceable)all year001B
pH, minimumsingle readingreport only (SU) (alert, not enforceable)all year001B
Coliform, fecal generalmonthly average≤ 200 #/100mLall year001B
Coliform, fecal generalmonthly average≤ 200 #/100mLall year001B
Coliform, fecal generalweekly average≤ 400 #/100mLall year001B
Coliform, fecal generalweekly average≤ 400 #/100mLall year001B
Flowdaily maximumreport only (MGD) (alert, not enforceable)all year001B
Flowdaily maximumreport only (MGD) (alert, not enforceable)all year001B
Flowmonthly averagereport only (MGD) (alert, not enforceable)all year001B
Flowmonthly averagereport only (MGD) (alert, not enforceable)all year001B
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001B
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001B
Total production - massmonthly averagereport only (ton/d) (alert, not enforceable)all yearANOD
Total production - massmonthly averagereport only (ton/d) (alert, not enforceable)all yearANOD
Total production - massmonthly averagereport only (ton/d) (alert, not enforceable)all yearDCPT
Total production - massmonthly averagereport only (ton/d) (alert, not enforceable)all yearDCPT

How strict are these limits?

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

Same industry: the 8 Primary Metal Industries permits in Washington.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/WA0000540 · MCP: https://passage-data.com/mcp