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City of Enumclaw

Sewage treatment plant, major discharger, Enumclaw, Washington. NPDES permit WA0020575, in force until Jun 30, 2030. Last 12 months: no values over a limit, 20 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form MM monthly (25 values), outfall 001 form QQ quarterly (2 values), outfall INFL form MM monthly (10 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 3 required values missing, 0 of 25 reports late

Limits in force (53)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigradesingle readingreport only (deg C) (alert, not enforceable)all year001
BOD, 5-day, 20 deg. Cmonthly average≤ 16.1 mg/LMay–Oct001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cweekly average≤ 24.2 mg/LMay–Oct001
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cmonthly average≤ 690 lb/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cmonthly average≤ 336 lb/dMay–Oct001
BOD, 5-day, 20 deg. Cweekly average≤ 1035 lb/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cweekly average≤ 504 lb/dMay–Oct001
pHdaily minimum≥ 6.5 SUall year001
pHdaily maximum≤ 8.5 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 690 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendedmonthly average≤ 626 lb/dMay–Oct001
Solids, total suspendedweekly average≤ 1035 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendedweekly average≤ 938 lb/dMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 1.6 mg/LMay–Oct001
Nitrogen, ammonia total [as N]maximumreport only (mg/L) (alert, not enforceable)Jan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L) (alert, not enforceable)Jan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]maximumreport only (lb/d) (alert, not enforceable)Jan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d) (alert, not enforceable)May–Oct001
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d) (alert, not enforceable)Jan, Feb, Mar, Apr, Nov, Dec001
Phosphorus, total [as P]maximumreport only (mg/L) (alert, not enforceable)all year001
Phosphorus, total [as P]monthly averagereport only (mg/L) (alert, not enforceable)all year001
Phosphorus, dissolved reactive [drp as P]monthly average≤ 1 mg/LMay–Oct001
Phosphorus, dissolved reactive [drp as P]maximumreport only (mg/L) (alert, not enforceable)Jan, Feb, Mar, Apr, Nov, Dec001
Phosphorus, dissolved reactive [drp as P]weekly average≤ 1.5 mg/LMay–Oct001
Phosphorus, dissolved reactive [drp as P]monthly averagereport only (mg/L) (alert, not enforceable)Jan, Feb, Mar, Apr, Nov, Dec001
Copper, total [as Cu]maximumreport only (ug/L) (alert, not enforceable)all year001
Copper, total [as Cu]monthly averagereport only (ug/L) (alert, not enforceable)all year001
Zinc, total [as Zn]maximumreport only (ug/L) (alert, not enforceable)all year001
Zinc, total [as Zn]monthly averagereport only (ug/L) (alert, not enforceable)all year001
Pentachlorophenolsingle readingreport only (ug/L) (alert, not enforceable)all year001
Di[2-ethylhexyl] phthalate [DEHP]single readingreport only (ug/L) (alert, not enforceable)all year001
BOD, percent removal [total]monthly average minimum≥ 85 %all year001
Coliform, fecal generalmonthly geometric mean≤ 100 #/100mLall year001
Coliform, fecal generalweekly geometric mean≤ 200 #/100mLall year001
Flowaveragereport only (MGD) (alert, not enforceable)all year001
Flowmaximumreport 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)May–OctINFL
Flowmaximumreport only (MGD) (alert, not enforceable)Jan, Feb, Mar, Apr, Nov, DecINFL
Flowmonthly averagereport only (MGD) (alert, not enforceable)May–OctINFL
Flowmonthly averagereport only (MGD) (alert, not enforceable)Jan, Feb, Mar, Apr, Nov, DecINFL

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/WA0020575 · MCP: https://passage-data.com/mcp