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Town of Fairfield

Sewage treatment plant, Fairfield, Washington. NPDES permit WA0045489 expired Apr 30, 2014; its limits 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 (16 values), outfall IN1 form MM monthly (10 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 24 reports late

Limits in force (75)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. Cmonthly average≤ 15 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 15 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 23 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 23 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 29 lb/dall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 29 lb/dall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 29 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 44.5 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 44.5 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 44.5 lb/dall year001
pHmaximum≤ 9 SUall year001
pHmaximum≤ 9 SUall year001
pHminimum≥ 6 SUall year001
pHminimum≥ 6 SUall year001
Solids, total suspendedmonthly average≤ 15 mg/Lall year001
Solids, total suspendedmonthly average≤ 15 mg/Lall year001
Solids, total suspendedweekly average≤ 23 mg/Lall year001
Solids, total suspendedweekly average≤ 23 mg/Lall year001
Solids, total suspendedmonthly average≤ 29 lb/dall year001
Solids, total suspendedmonthly average≤ 29 lb/dall year001
Solids, total suspendedmonthly average≤ 29 lb/dall year001
Solids, total suspendedweekly average≤ 44.5 lb/dall year001
Solids, total suspendedweekly average≤ 44.5 lb/dall year001
Solids, total suspendedweekly average≤ 44.5 lb/dall year001
Nitrogen, ammonia total [as N]average≤ 2.3 mg/LJan, Feb, Mar, Apr, May, Dec001
Nitrogen, ammonia total [as N]average≤ 2.3 mg/LJan, Feb, Mar, Apr, May, Dec001
Nitrogen, ammonia total [as N]averagereport only (mg/L) (alert, not enforceable)Jun–Sep001
Nitrogen, ammonia total [as N]averagereport only (mg/L) (alert, not enforceable)Jun–Sep001
Nitrogen, ammonia total [as N]average≤ 1.2 mg/LOct, Nov001
Nitrogen, ammonia total [as N]average≤ 1.2 mg/LOct, Nov001
Nitrogen, ammonia total [as N]maximum≤ 4.6 mg/LJan, Feb, Mar, Apr, May, Dec001
Nitrogen, ammonia total [as N]maximum≤ 4.6 mg/LJan, Feb, Mar, Apr, May, Dec001
Nitrogen, ammonia total [as N]maximumreport only (mg/L) (alert, not enforceable)Jun–Sep001
Nitrogen, ammonia total [as N]maximumreport only (mg/L) (alert, not enforceable)Jun–Sep001
Nitrogen, ammonia total [as N]maximum≤ 2.5 mg/LOct, Nov001
Nitrogen, ammonia total [as N]maximum≤ 2.5 mg/LOct, Nov001
BOD, percent removal [total]monthly average minimum≥ 85 %all year001
Coliform, fecal generalmonthly average≤ 100 #/100mLall year001
Coliform, fecal generalmonthly average≤ 100 #/100mLall year001
Coliform, fecal generalweekly average≤ 200 #/100mLall year001
Coliform, fecal generalweekly average≤ 200 #/100mLall year001
Flowaveragereport only (gal/d) (alert, not enforceable)all year001
Flowaveragereport only (gal/d) (alert, not enforceable)all year001
Flowmaximumreport only (gal/d) (alert, not enforceable)all year001
Flowmaximumreport only (gal/d) (alert, not enforceable)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. 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. Caverage≤ 193 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 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
Solids, total suspendedmaximumreport only (lb/d) (alert, not enforceable)all yearIN1
Phosphorus, total [as P]averagereport only (mg/L) (alert, not enforceable)all yearIN1
Phosphorus, total [as P]averagereport only (mg/L) (alert, not enforceable)all yearIN1
Phosphorus, total [as P]maximumreport only (mg/L) (alert, not enforceable)all yearIN1
Phosphorus, total [as P]maximumreport only (mg/L) (alert, not enforceable)all yearIN1
Phosphorus, total [as P]averagereport only (lb/d) (alert, not enforceable)all yearIN1
Phosphorus, total [as P]averagereport only (lb/d) (alert, not enforceable)all yearIN1
Phosphorus, total [as P]averagereport only (lb/d) (alert, not enforceable)all yearIN1
Phosphorus, total [as P]maximumreport only (lb/d) (alert, not enforceable)all yearIN1
Phosphorus, total [as P]maximumreport only (lb/d) (alert, not enforceable)all yearIN1
Phosphorus, total [as P]maximumreport only (lb/d) (alert, not enforceable)all yearIN1
Flowaveragereport only (gal/d) (alert, not enforceable)all yearIN1
Flowaveragereport only (gal/d) (alert, not enforceable)all yearIN1
Flowmaximumreport only (gal/d) (alert, not enforceable)all yearIN1
Flowmaximumreport only (gal/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/WA0045489 · MCP: https://passage-data.com/mcp