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Washington State Department of Corrections

Sewage treatment plant, Forks, Washington. NPDES permit WA0038938, in force until Apr 30, 2030. Last 12 months: over a limit 2 times (last December 2025). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form MM monthly (25 values), outfall INFL form MM monthly (10 values), outfall 001 form AA yearly
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 24 reports late

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

Period endingParameterReportedLimitOver by
December 2025Solids, total suspended, weekly average109≤ 39 lb/d179%
December 2025Solids, total suspended, weekly average61.4≤ 45 mg/L36%

Limits in force (43)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigrademaximumreport only (deg C) (alert, not enforceable)all year001
Temperature, water deg. centigrademonthly averagereport only (deg C) (alert, not enforceable)all year001
Oxygen, dissolved [DO]single readingreport only (mg/L) (alert, not enforceable)all year001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 26 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 39 lb/dall year001
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 26 lb/dall year001
Solids, total suspendedweekly average≤ 39 lb/dall year001
Nitrogen, ammonia total [as N]maximumreport only (mg/L) (alert, not enforceable)all year001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L) (alert, not enforceable)all year001
Nitrogen, Kjeldahl, total [as N]single readingreport only (mg/L) (alert, not enforceable)all year001
Nitrite + Nitrate total [as N]single readingreport only (mg/L) (alert, not enforceable)all year001
Phosphorus, total [as P]single readingreport only (mg/L) (alert, not enforceable)all year001
Hardness, total [as CaCO3]single readingreport only (mg/L) (alert, not enforceable)all year001
Copper, total [as Cu]monthly averagereport only (ug/L) (alert, not enforceable)all year001
Rainfallmaximumreport only (in) (alert, not enforceable)all year001
Rainfallmonthly averagereport only (in) (alert, not enforceable)all year001
Ultraviolet light intensitymaximumreport only (mW/cm2) (alert, not enforceable)all year001
Ultraviolet light intensitymonthly averagereport only (mW/cm2) (alert, not enforceable)all year001
BOD, percent removal [total]monthly average minimum≥ 85 %all year001
E. colisingle readingreport only (#/100mL) (alert, not enforceable)all year001
Oil & grease, non-polar materialsingle readingreport only (mg/L) (alert, not enforceable)all year001
Solids, total dissolvedsingle readingreport only (mg/L) (alert, not enforceable)all year001
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year001
Coliform, fecal generalweekly geometric mean≤ 400 #/100mLall year001
Flowmaximumreport only (MGD) (alert, not enforceable)all year001
Flowmonthly averagereport only (MGD) (alert, not enforceable)all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
BOD, 5-day, 20 deg. Cmaximumreport only (mg/L) (alert, not enforceable)all yearINFL
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L) (alert, not enforceable)all yearINFL
BOD, 5-day, 20 deg. Cmaximumreport only (lb/d) (alert, not enforceable)all yearINFL
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d) (alert, not enforceable)all yearINFL
Solids, total suspendedmaximumreport only (mg/L) (alert, not enforceable)all yearINFL
Solids, total suspendedmonthly averagereport only (mg/L) (alert, not enforceable)all yearINFL
Solids, total suspendedmaximumreport only (lb/d) (alert, not enforceable)all yearINFL
Solids, total suspendedmonthly averagereport only (lb/d) (alert, not enforceable)all yearINFL
Flowmaximumreport only (MGD) (alert, not enforceable)all yearINFL
Flowmonthly averagereport only (MGD) (alert, not enforceable)all yearINFL

How strict are these limits?

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

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Your permit document is the final word. As JSON: /api/v1/permits/WA0038938 · MCP: https://passage-data.com/mcp