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King County Dept of Natural Resources and Parks

Sewage treatment plant, major discharger, Renton, Washington. NPDES permit WA0029581 expired Jul 30, 2020; its limits still apply. Last 12 months: over a limit once (last March 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form MM monthly (21 values), outfall 001A form MM monthly (2 values), outfall 002A form MM monthly (8 values), outfall 002B form MM monthly (1 value), outfall 002C form MM monthly (2 values), outfall IN1 form MM monthly (6 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 72 reports late

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

Period endingParameterReportedLimitOver by
March 2026Coliform, fecal general, weekly geometric mean490≤ 400 #/100mL23%

Limits in force (80)

ParameterStatisticLimitMonthsOutfall
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≤ 36000 lb/dall year001
Solids, total suspendedaverage≤ 36000 lb/dall year001
Solids, total suspendedweekly average≤ 54000 lb/dall year001
Solids, total suspendedweekly average≤ 54000 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, ammonia total [as N]averagereport only (lb/d) (alert, not enforceable)all year001
Nitrogen, ammonia total [as N]averagereport only (lb/d) (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, dissolved reactive [drp 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
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
BOD, carbonaceous [5 day, 20 C]average≤ 25 mg/Lall 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]weekly average≤ 40 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]average≤ 30000 lb/dall year001
BOD, carbonaceous [5 day, 20 C]average≤ 30000 lb/dall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 48000 lb/dall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 48000 lb/dall year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Carbonaceous oxygen demand, % removalmonthly average minimum≥ 85 %all year001
Carbonaceous oxygen demand, % removalmonthly average minimum≥ 85 %all year001
Chlorine, total residualaverage≤ 500 ug/Lall year001A
Chlorine, total residualaverage≤ 500 ug/Lall year001A
Chlorine, total residualmaximum≤ 750 ug/Lall year001A
Chlorine, total residualmaximum≤ 750 ug/Lall year001A
Solids, total suspendedaverage≤ 20 mg/Lall year002A
Solids, total suspendedaverage≤ 20 mg/Lall year002A
Durationmaximum≤ 4 hrall year002A
Durationmaximum≤ 4 hrall year002A
Chlorine, total residualaverage≤ 95 ug/Lall year002A
Chlorine, total residualaverage≤ 95 ug/Lall year002A
pH, maximumdaily maximum≤ 9 SUall year002A
pH, maximumdaily maximum≤ 9 SUall year002A
pH, minimumdaily minimum≥ 6 SUall year002A
pH, minimumdaily minimum≥ 6 SUall year002A
Coliform, fecal generaldaily maximum≤ 200 #/100mLall year002A
Coliform, fecal generaldaily maximum≤ 200 #/100mLall year002A
Flowdaily maximumreport only (MGD) (alert, not enforceable)all year002A
Flowdaily maximumreport only (MGD) (alert, not enforceable)all year002A
BOD, carbonaceous [5 day, 20 C]average≤ 20 mg/Lall year002A
BOD, carbonaceous [5 day, 20 C]average≤ 20 mg/Lall year002A
Turbiditydaily maximumreport only (NTU) (alert, not enforceable)all year002B
Turbiditydaily maximumreport only (NTU) (alert, not enforceable)all year002B
Turbiditydaily maximumreport only (NTU) (alert, not enforceable)all year002C
Turbiditydaily maximumreport only (NTU) (alert, not enforceable)all year002C
Flowaverage≤ 500 cfsall year002C
Flowaverage≤ 500 cfsall year002C
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. Caveragereport only (lb/d) (alert, not enforceable)all yearIN1
BOD, 5-day, 20 deg. Caveragereport 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 suspendedaveragereport only (lb/d) (alert, not enforceable)all yearIN1
Solids, total suspendedaveragereport only (lb/d) (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]averagereport only (mg/L) (alert, not enforceable)all yearIN1
BOD, carbonaceous [5 day, 20 C]averagereport only (lb/d) (alert, not enforceable)all yearIN1
BOD, carbonaceous [5 day, 20 C]averagereport only (lb/d) (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/WA0029581 · MCP: https://passage-data.com/mcp