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Friday Harbor Town

Sewage treatment plant, Friday Harbor, Washington. NPDES permit WA0023582 expired Aug 31, 2022; its limits still apply. Last 12 months: over a limit 20 times (last April 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form MM monthly (16 values), outfall 001 form QQ quarterly (3 values), outfall IN1 form MM monthly (8 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
2 values over a limit, 3 required values missing, 3 of 28 reports late

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

All 20 values over a limit
Period endingParameterReportedLimitOver by
December 2025Solids, total suspended, average35.6429≤ 30 mg/L19%
January 2026Solids, total suspended, average32.6154≤ 30 mg/L9%
February 2026BOD, 5-day, 20 deg. C, average33.15≤ 30 mg/L11%
February 2026Solids, total suspended, average175≤ 173 lb/d1%
February 2026Solids, total suspended, average81.5≤ 30 mg/L172%
February 2026Solids, total suspended, weekly average84≤ 45 mg/L87%
March 2026BOD, 5-day, 20 deg. C, average206.077≤ 173 lb/d19%
March 2026BOD, 5-day, 20 deg. C, average74.9615≤ 30 mg/L150%
March 2026BOD, 5-day, 20 deg. C, weekly average102≤ 45 mg/L127%
March 2026Coliform, fecal general, monthly geometric mean341.674≤ 200 #/100mL71%
March 2026Coliform, fecal general, weekly geometric mean506≤ 400 #/100mL27%
March 2026Solids, total suspended, average144.231≤ 30 mg/L381%
March 2026Solids, total suspended, average362.538≤ 173 lb/d110%
March 2026Solids, total suspended, weekly average160≤ 45 mg/L256%
March 2026Solids, total suspended, weekly average440≤ 260 lb/d69%
April 2026BOD, 5-day, 20 deg. C, average33.5714≤ 30 mg/L12%
April 2026BOD, 5-day, 20 deg. C, weekly average77≤ 45 mg/L71%
April 2026Solids, total suspended, average49.7143≤ 30 mg/L66%
April 2026Solids, total suspended, weekly average178≤ 45 mg/L296%
April 2026Solids, total suspended, weekly average310≤ 260 lb/d19%

Limits in force (56)

ParameterStatisticLimitMonthsOutfall
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≤ 173 lb/dall year001
BOD, 5-day, 20 deg. Caverage≤ 173 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 260 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 260 lb/dall year001
pHdaily minimum≥ 6 SUall year001
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
pHdaily maximum≤ 9 SUall 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≤ 173 lb/dall year001
Solids, total suspendedaverage≤ 173 lb/dall year001
Solids, total suspendedweekly average≤ 260 lb/dall year001
Solids, total suspendedweekly average≤ 260 lb/dall year001
Nitrogen, ammonia total [as N]maximumreport only (mg/L) (alert, not enforceable)all year001
Nitrogen, ammonia total [as N]maximumreport only (mg/L) (alert, not enforceable)all year001
Nitrogen, Kjeldahl, total [as N]maximumreport only (mg/L) (alert, not enforceable)all year001
Nitrogen, Kjeldahl, total [as N]maximumreport only (mg/L) (alert, not enforceable)all year001
Nitrite + Nitrate total [as N]maximumreport only (mg/L) (alert, not enforceable)all year001
Nitrite + Nitrate total [as N]maximumreport only (mg/L) (alert, not enforceable)all year001
Ultraviolet light intensityminimumreport only (mW/cm2) (alert, not enforceable)all year001
Ultraviolet light intensityminimumreport only (mW/cm2) (alert, not enforceable)all year001
Chlorine, total residualaveragereport only (mg/L) (alert, not enforceable)all year001
Chlorine, total residualaveragereport only (mg/L) (alert, not enforceable)all year001
BOD, percent removal [total]monthly average minimum≥ 85 %all 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
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/WA0023582 · MCP: https://passage-data.com/mcp