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Town of Spangle

Sewage treatment plant, Spangle, Washington. NPDES permit WA0991010, in force until Mar 31, 2030. Last 12 months: over a limit 8 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form MM monthly (23 values), outfall 001 form QQ quarterly (2 values), outfall IN1 form MM monthly (4 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
3 values over a limit, 0 required values missing, 0 of 26 reports late

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

Period endingParameterReportedLimit
March 2026pH, maximum, maximum9.6≤ 8.5 SU
April 2026pH, maximum, maximum9.9≤ 8.5 SU
May 2026pH, maximum, maximum10.1≤ 8.5 SU
June 2026pH, maximum, maximum9.7≤ 8.5 SU
July 2026pH, maximum, maximum10.3≤ 8.5 SU
August 2026pH, maximum, maximum12.1≤ 8.5 SU
August 2026pH, minimum, minimum6≥ 6.5 SU
September 2026pH, minimum, minimum6.1≥ 6.5 SU

Limits in force (29)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigrademaximumreport only (deg C) (alert, not enforceable)all year001
Oxygen, dissolved [DO]minimumreport only (mg/L) (alert, not enforceable)all year001
Oxygen, dissolved [DO]monthly averagereport only (mg/L) (alert, not enforceable)all year001
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 5.7 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 8.5 lb/dall year001
Solids, total suspendedmonthly average≤ 15 mg/Lall year001
Solids, total suspendedweekly average≤ 22.5 mg/Lall year001
Solids, total suspendedmonthly average≤ 8.5 lb/dall year001
Solids, total suspendedweekly average≤ 12.8 lb/dall year001
Nitrogen, ammonia total [as N]monthly average≤ 1 mg/Lall year001
Nitrogen, ammonia total [as N]weekly average≤ 1.5 mg/Lall year001
Phosphorus, total [as P]maximum≤ 10.8 mg/Lall year001
Phosphorus, total [as P]monthly average≤ 5.7 mg/Lall year001
BOD, percent removal [total]monthly average minimum≥ 85 %all year001
E. colimaximumreport only (#/100mL) (alert, not enforceable)all year001
Number of operating tubesmaximumreport only (#) (alert, not enforceable)all year001
pH, maximummaximum≤ 8.5 SUall year001
pH, minimumminimum≥ 6.5 SUall year001
Coliform, fecal generalmonthly geometric mean≤ 100 #/100mLall year001
Coliform, fecal generalweekly geometric mean≤ 200 #/100mLall year001
Flowmaximumreport only (gal/d) (alert, not enforceable)all year001
Flowmonthly averagereport only (gal/d) (alert, not enforceable)all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L) (alert, not enforceable)all yearIN1
BOD, 5-day, 20 deg. Cweekly averagereport only (mg/L) (alert, not enforceable)all yearIN1
Solids, total suspendedmonthly averagereport only (mg/L) (alert, not enforceable)all yearIN1
Solids, total suspendedweekly averagereport only (mg/L) (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/WA0991010 · MCP: https://passage-data.com/mcp