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Town of Ione

Sewage treatment plant, Ione, Washington. NPDES permit WA0045373 expired May 31, 2013; its limits still apply. Last 12 months: over a limit 8 times (last April 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form MM monthly (11 values), outfall IN1 form MM monthly (8 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 0 of 24 reports late

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

Period endingParameterReportedLimitOver by
April 2026BOD, 5-day, 20 deg. C, monthly average38.4≤ 23.3 lb/d65%
April 2026BOD, 5-day, 20 deg. C, monthly average46≤ 30 mg/L53%
April 2026BOD, 5-day, 20 deg. C, weekly average103≤ 35 lb/d194%
April 2026BOD, 5-day, 20 deg. C, weekly average99≤ 45 mg/L120%
April 2026Solids, total suspended, monthly average26.6≤ 23.3 lb/d14%
April 2026Solids, total suspended, monthly average32≤ 30 mg/L7%
April 2026Solids, total suspended, weekly average65.9≤ 35 lb/d88%
April 2026Solids, total suspended, weekly average76≤ 45 mg/L69%

Limits in force (54)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigrademaximumreport only (deg C) (alert, not enforceable)all year001
Temperature, water deg. centigrademaximumreport only (deg C) (alert, not enforceable)all year001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 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. Cmonthly average≤ 23.3 lb/dall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 23.3 lb/dall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 23.3 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 35 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 35 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 35 lb/dall year001
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 23.3 lb/dall year001
Solids, total suspendedmonthly average≤ 23.3 lb/dall year001
Solids, total suspendedmonthly average≤ 23.3 lb/dall year001
Solids, total suspendedweekly average≤ 35 lb/dall year001
Solids, total suspendedweekly average≤ 35 lb/dall year001
Solids, total suspendedweekly average≤ 35 lb/dall year001
Nitrogen, ammonia total [as N]maximumreport only (mg/L) (alert, not enforceable)all year001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L) (alert, not enforceable)all year001
Coliform, fecal generalmonthly average≤ 200 #/100mLall year001
Coliform, fecal generalmonthly average≤ 200 #/100mLall year001
Coliform, fecal generalweekly average≤ 400 #/100mLall year001
Coliform, fecal generalweekly average≤ 400 #/100mLall year001
Flowmaximumreport only (MGD) (alert, not enforceable)all year001
Flowmonthly averagereport only (MGD) (alert, not enforceable)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. 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
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
Flowmaximumreport only (MGD) (alert, not enforceable)all yearIN1
Flowmonthly averagereport only (MGD) (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/WA0045373 · MCP: https://passage-data.com/mcp