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City of Pateros

Sewage treatment plant, Pateros, Washington. NPDES permit WA0020559, in force until Aug 31, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form AA yearly
Last report on file
December 2025
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 23 reports late

Limits in force (6)

ParameterStatisticLimitMonths
Oil and grease, hexane extr methodsingle readingreport only (mg/L) (alert, not enforceable)all year
Nitrogen, Kjeldahl, total [as N]single readingreport only (mg/L) (alert, not enforceable)all year
Nitrite + Nitrate total [as N]single readingreport only (mg/L) (alert, not enforceable)all year
Phosphorus, total [as P]single readingreport only (mg/L) (alert, not enforceable)all year
E. colisingle readingreport only (#/100mL) (alert, not enforceable)all year
Solids, total dissolvedsingle readingreport only (mg/L) (alert, not enforceable)all year

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/WA0020559 · MCP: https://passage-data.com/mcp