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Snoqualmie Wastewater & Water Reclamation Facility

Sewage treatment plant, major discharger, Snoqualmie, Washington. NPDES permit WA0022403 expired Jun 30, 2026; its terms 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 (27 values), outfall 002 form MM monthly (2 values), outfall 002D form MM monthly (3 values), outfall FIL form MM monthly (2 values), outfall IN1 form MM monthly (12 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 60 reports late

Limits in force (50)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigrademaximumreport only (deg C) (alert, not enforceable)all year001
Alkalinity, total [as CaCO3]averagereport only (mg/L) (alert, not enforceable)all year001
Solids, total suspendedaverage≤ 30 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedaverage≤ 538 lb/dall year001
Solids, total suspendedweekly average≤ 807 lb/dall year001
Nitrogen, ammonia total [as N]averagereport only (mg/L) (alert, not enforceable)all year001
Nitrogen, ammonia total [as N]maximumreport only (mg/L) (alert, not enforceable)all year001
Nitrogen, ammonia total [as N]average≤ 21.6 lb/dAug–Oct001
Nitrogen, ammonia total [as N]averagereport only (lb/d) (alert, not enforceable)Jan, Feb, Mar, Apr, May, Jun, Jul, Nov, Dec001
Nitrogen, ammonia total [as N]maximumreport only (lb/d) (alert, not enforceable)Jan, Feb, Mar, Apr, May, Jun, Jul, Nov, Dec001
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
Phosphorus, total [as P]averagereport only (mg/L) (alert, not enforceable)all year001
Phosphorus, dissolved reactive [drp as P]averagereport only (mg/L) (alert, not enforceable)all year001
Phosphorus, dissolved reactive [drp as P]maximumreport only (mg/L) (alert, not enforceable)all year001
Phosphorus, dissolved reactive [drp as P]averagereport only (lb/d) (alert, not enforceable)all year001
Phosphorus, dissolved reactive [drp as P]maximumreport only (lb/d) (alert, not enforceable)all year001
pH, maximumdaily maximum≤ 9 SUall year001
pH, minimumdaily minimum≥ 6.3 SUall year001
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year001
Coliform, fecal generalweekly geometric mean≤ 400 #/100mLall year001
Flowaveragereport only (MGD) (alert, not enforceable)all year001
Flowmaximumreport only (MGD) (alert, not enforceable)all year001
BOD, carbonaceous [5 day, 20 C]average≤ 25 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 40 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]average≤ 51.6 lb/dAug–Oct001
BOD, carbonaceous [5 day, 20 C]average≤ 448 lb/dJan, Feb, Mar, Apr, May, Jun, Jul, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 717 lb/dJan, Feb, Mar, Apr, May, Jun, Jul, Nov, Dec001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Carbonaceous oxygen demand, % removalmonthly average minimum≥ 85 %all year001
Turbidityaverage≤ 2 NTUall year002
Oxygen, dissolved [DO]averagereport only (mg/L) (alert, not enforceable)all year002
Coliform, total generaldaily maximum≤ 23 MPN/100mLall year002D
Flowaveragereport only (MGD) (alert, not enforceable)all year002D
Flowmaximumreport only (MGD) (alert, not enforceable)all year002D
Coagulants addedaveragereport only (lb/d) (alert, not enforceable)all yearFIL
Coagulants addedmaximumreport only (lb/d) (alert, not enforceable)all yearFIL
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. Caveragereport 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 suspendedmaximumreport only (mg/L) (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
Flowaveragereport only (MGD) (alert, not enforceable)all yearIN1
Flowmaximumreport only (MGD) (alert, not enforceable)all yearIN1
BOD, carbonaceous [5 day, 20 C]averagereport only (mg/L) (alert, not enforceable)all yearIN1
BOD, carbonaceous [5 day, 20 C]maximumreport only (mg/L) (alert, not enforceable)all yearIN1

How strict are these limits?

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/WA0022403 · MCP: https://passage-data.com/mcp