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City of Ferndale

Sewage treatment plant, major discharger, Ferndale, Washington. NPDES permit WA0022454 expired Jul 31, 2019; its limits still apply. Last 12 months: over a limit once (last October 2025). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form MM monthly (19 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

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

Period endingParameterReportedLimit
October 2025Chlorine, total residual, average> 34.06≤ 34 ug/L

Limits in force (58)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigradeaveragereport only (deg C) (alert, not enforceable)all year001
Temperature, water deg. centigradeaveragereport only (deg C) (alert, not enforceable)all year001
Temperature, water deg. centigrademaximumreport only (deg C) (alert, not enforceable)all year001
Temperature, water deg. centigrademaximumreport only (deg C) (alert, not enforceable)all 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≤ 808 lb/dall year001
Solids, total suspendedaverage≤ 808 lb/dall year001
Solids, total suspendedweekly average≤ 1212 lb/dall year001
Solids, total suspendedweekly average≤ 1212 lb/dall year001
Chlorine, total residualaverage≤ 34 ug/Lall year001
Chlorine, total residualaverage≤ 34 ug/Lall year001
Coliform, fecal generalmonthly geometric mean≤ 28 #/100mLall year001
Coliform, fecal generalmonthly geometric mean≤ 28 #/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
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≤ 673 lb/dall year001
BOD, carbonaceous [5 day, 20 C]average≤ 673 lb/dall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 1077 lb/dall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 1077 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
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
Flowaveragereport only (MGD) (alert, not enforceable)all yearIN1
Flowaveragereport only (MGD) (alert, not enforceable)all yearIN1
Flowmaximumreport 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]averagereport only (mg/L) (alert, not enforceable)all yearIN1
BOD, carbonaceous [5 day, 20 C]maximumreport only (mg/L) (alert, not enforceable)all yearIN1
BOD, carbonaceous [5 day, 20 C]maximumreport 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
BOD, carbonaceous [5 day, 20 C]maximumreport only (lb/d) (alert, not enforceable)all yearIN1
BOD, carbonaceous [5 day, 20 C]maximumreport only (lb/d) (alert, not enforceable)all yearIN1

How strict are these limits?

Cited limits by parameter: Washington's rules and the federal ones.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/WA0022454 · MCP: https://passage-data.com/mcp