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Alderwood Water & Wastewater District

Sewage treatment plant, major discharger, Edmonds, Washington. NPDES permit WA0020826 expired Nov 30, 2023; its limits still apply. Last 12 months: no values over a limit, 11 of 25 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 1 days after each period: outfall 001 form MM monthly (19 values), outfall 001 form QQ quarterly (5 values), outfall IN1 form MM monthly (8 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 12 of 28 reports late

Limits in force (64)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigradeaveragereport only (deg C) (alert, not enforceable)all year001
Temperature, water deg. centigradeaveragereport only (deg C) (alert, not enforceable)all year001
BOD, 5-day, 20 deg. Caverage≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Caverage≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Caverage≤ 1501 lb/dall year001
BOD, 5-day, 20 deg. Caverage≤ 1501 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 2252 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 2252 lb/dall year001
Solids, total suspendedaverage≤ 30 mg/Lall year001
Solids, total suspendedaverage≤ 30 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedaverage≤ 1501 lb/dall year001
Solids, total suspendedaverage≤ 1501 lb/dall year001
Solids, total suspendedweekly average≤ 2252 lb/dall year001
Solids, total suspendedweekly average≤ 2252 lb/dall year001
Nitrogen, ammonia total [as N]averagereport only (mg/L) (alert, not enforceable)all year001
Nitrogen, ammonia total [as N]averagereport only (mg/L) (alert, not enforceable)all year001
Nitrogen, Kjeldahl, total [as N]averagereport only (mg/L) (alert, not enforceable)all year001
Nitrogen, Kjeldahl, total [as N]averagereport only (mg/L) (alert, not enforceable)all year001
Nitrite + Nitrate total [as N]averagereport only (mg/L) (alert, not enforceable)all year001
Nitrite + Nitrate total [as N]averagereport only (mg/L) (alert, not enforceable)all year001
Phosphorus, total [as P]averagereport only (mg/L) (alert, not enforceable)all year001
Phosphorus, total [as P]averagereport only (mg/L) (alert, not enforceable)all year001
Phosphorus [reactive as P]averagereport only (mg/L) (alert, not enforceable)all year001
Phosphorus [reactive as P]averagereport only (mg/L) (alert, not enforceable)all year001
Ultraviolet light intensityaveragereport only (mW/cm2) (alert, not enforceable)all year001
Ultraviolet light intensityaveragereport only (mW/cm2) (alert, not enforceable)all year001
BOD, percent removal [total]monthly average minimum≥ 85 %all year001
BOD, percent removal [total]monthly average minimum≥ 85 %all year001
Ultraviolet light transmittanceaveragereport only (%) (alert, not enforceable)all year001
Ultraviolet light transmittanceaveragereport only (%) (alert, not enforceable)all year001
pH, maximumdaily maximum≤ 9 SUall year001
pH, maximumdaily maximum≤ 9 SUall year001
pH, minimumdaily minimum≥ 6 SUall year001
pH, minimumdaily minimum≥ 6 SUall year001
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year001
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year001
Coliform, fecal generalweekly geometric mean≤ 400 #/100mLall year001
Coliform, fecal generalweekly geometric mean≤ 400 #/100mLall year001
Flowaveragereport only (MGD) (alert, not enforceable)all year001
Flowaveragereport only (MGD) (alert, not enforceable)all year001
Flowmaximumreport only (MGD) (alert, not enforceable)all year001
Flowmaximumreport only (MGD) (alert, not enforceable)all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
BOD, 5-day, 20 deg. Caveragereport only (mg/L) (alert, not enforceable)all yearIN1
BOD, 5-day, 20 deg. Caveragereport only (mg/L) (alert, not enforceable)all yearIN1
BOD, 5-day, 20 deg. Cmaximumreport only (mg/L) (alert, not enforceable)all yearIN1
BOD, 5-day, 20 deg. Cmaximumreport only (mg/L) (alert, not enforceable)all yearIN1
BOD, 5-day, 20 deg. Caveragereport only (lb/d) (alert, not enforceable)all yearIN1
BOD, 5-day, 20 deg. Caveragereport only (lb/d) (alert, not enforceable)all yearIN1
BOD, 5-day, 20 deg. Cmaximumreport only (lb/d) (alert, not enforceable)all yearIN1
BOD, 5-day, 20 deg. Cmaximumreport only (lb/d) (alert, not enforceable)all yearIN1
Solids, total suspendedaveragereport only (mg/L) (alert, not enforceable)all yearIN1
Solids, total suspendedaveragereport only (mg/L) (alert, not enforceable)all yearIN1
Solids, total suspendedmaximumreport only (mg/L) (alert, not enforceable)all yearIN1
Solids, total suspendedmaximumreport only (mg/L) (alert, not enforceable)all yearIN1
Solids, total suspendedaveragereport only (lb/d) (alert, not enforceable)all yearIN1
Solids, total suspendedaveragereport only (lb/d) (alert, not enforceable)all yearIN1
Solids, total suspendedmaximumreport only (lb/d) (alert, not enforceable)all yearIN1
Solids, total suspendedmaximumreport only (lb/d) (alert, not enforceable)all yearIN1

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/WA0020826 · MCP: https://passage-data.com/mcp