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Western Towboat Company

Boat Building And Repairing, Seattle, Washington. NPDES permit WA0032191 expired Jun 30, 2025; its limits still apply. Last 12 months: over a limit once (last March 2026), 1 of 3 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form QQ quarterly (7 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 4 reports late

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

Period endingParameterReportedLimitOver by
March 2026Zinc, total [as Zn], daily maximum510≤ 425 ug/L20%

Limits in force (14)

ParameterStatisticLimitMonths
Turbiditydaily maximum≤ 25 NTUall year
Turbiditydaily maximum≤ 25 NTUall year
pHdaily minimum≥ 5.4 SUall year
pHdaily minimum≥ 5.4 SUall year
pHdaily maximum≤ 8.5 SUall year
pHdaily maximum≤ 8.5 SUall year
Copper, total [as Cu]daily maximumreport only (ug/L) (alert, not enforceable)all year
Copper, total [as Cu]daily maximumreport only (ug/L) (alert, not enforceable)all year
Zinc, total [as Zn]daily maximum≤ 425 ug/Lall year
Zinc, total [as Zn]daily maximum≤ 425 ug/Lall year
Flowtotalreport only (gal/d) (alert, not enforceable)all year
Flowtotalreport only (gal/d) (alert, not enforceable)all year
Oil and grease visualdaily maximum≤ 0 N=0;Y=1all year
Oil and grease visualdaily maximum≤ 0 N=0;Y=1all year

How strict are these limits?

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

Same industry: the 13 Transportation Equipment permits in Washington.

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/WA0032191 · MCP: https://passage-data.com/mcp