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City of Pomeroy

Sewage treatment plant, Pomeroy, Washington. NPDES permit WA0021164 expired Oct 31, 2023; its limits still apply. Last 12 months: no values over a limit, 34 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form MM monthly (21 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 (88)

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
Oxygen, dissolved [DO]daily minimum≥ 6 mg/LJun–Nov001
Oxygen, dissolved [DO]daily minimum≥ 6 mg/LJun–Nov001
Oxygen, dissolved [DO]minimumreport only (mg/L) (alert, not enforceable)Jan, Feb, Mar, Apr, May, Dec001
Oxygen, dissolved [DO]minimumreport only (mg/L) (alert, not enforceable)Jan, Feb, Mar, Apr, May, Dec001
BOD, 5-day, 20 deg. Cmonthly average≤ 15 mg/LJun–Nov001
BOD, 5-day, 20 deg. Cmonthly average≤ 15 mg/LJun–Nov001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, May, Dec001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, May, Dec001
BOD, 5-day, 20 deg. Cweekly average≤ 23 mg/LJun–Nov001
BOD, 5-day, 20 deg. Cweekly average≤ 23 mg/LJun–Nov001
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/LJan, Feb, Mar, Apr, May, Dec001
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/LJan, Feb, Mar, Apr, May, Dec001
BOD, 5-day, 20 deg. Cmonthly average≤ 56 lb/dJan, Feb, Mar, Apr, May, Dec001
BOD, 5-day, 20 deg. Cmonthly average≤ 56 lb/dJan, Feb, Mar, Apr, May, Dec001
BOD, 5-day, 20 deg. Cmonthly average≤ 34 lb/dJun–Nov001
BOD, 5-day, 20 deg. Cmonthly average≤ 34 lb/dJun–Nov001
BOD, 5-day, 20 deg. Cweekly average≤ 83 lb/dJan, Feb, Mar, Apr, May, Dec001
BOD, 5-day, 20 deg. Cweekly average≤ 83 lb/dJan, Feb, Mar, Apr, May, Dec001
BOD, 5-day, 20 deg. Cweekly average≤ 51 lb/dJun–Nov001
BOD, 5-day, 20 deg. Cweekly average≤ 51 lb/dJun–Nov001
pHdaily minimum≥ 6.5 SUall year001
pHdaily minimum≥ 6.5 SUall year001
pHdaily maximum≤ 7.8 SUall year001
pHdaily maximum≤ 7.8 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, May, Dec001
Solids, total suspendedmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, May, Dec001
Solids, total suspendedmonthly average≤ 15 mg/LJun–Nov001
Solids, total suspendedmonthly average≤ 15 mg/LJun–Nov001
Solids, total suspendedweekly average≤ 45 mg/LJan, Feb, Mar, Apr, May, Dec001
Solids, total suspendedweekly average≤ 45 mg/LJan, Feb, Mar, Apr, May, Dec001
Solids, total suspendedweekly average≤ 23 mg/LJun–Nov001
Solids, total suspendedweekly average≤ 23 mg/LJun–Nov001
Solids, total suspendedmonthly average≤ 34 lb/dJun–Nov001
Solids, total suspendedmonthly average≤ 34 lb/dJun–Nov001
Solids, total suspendedmonthly average≤ 56 lb/dJan, Feb, Mar, Apr, May, Dec001
Solids, total suspendedmonthly average≤ 56 lb/dJan, Feb, Mar, Apr, May, Dec001
Solids, total suspendedweekly average≤ 51 lb/dJun–Nov001
Solids, total suspendedweekly average≤ 51 lb/dJun–Nov001
Solids, total suspendedweekly average≤ 83 lb/dJan, Feb, Mar, Apr, May, Dec001
Solids, total suspendedweekly average≤ 83 lb/dJan, Feb, Mar, Apr, May, Dec001
Nitrogen, ammonia total [as N]maximumreport only (mg/L) (alert, not enforceable)Jun–Nov001
Nitrogen, ammonia total [as N]maximumreport only (mg/L) (alert, not enforceable)Jun–Nov001
Nitrogen, ammonia total [as N]monthly average≤ 2.1 mg/LJan, Feb, Mar, Apr, May, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 2.1 mg/LJan, Feb, Mar, Apr, May, Dec001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L) (alert, not enforceable)Jun–Nov001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L) (alert, not enforceable)Jun–Nov001
Nitrogen, ammonia total [as N]monthly average≤ 6 lb/dJan, Feb, Mar, Apr, May, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 6 lb/dJan, Feb, Mar, Apr, May, Dec001
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d) (alert, not enforceable)Jun–Nov001
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d) (alert, not enforceable)Jun–Nov001
BOD, percent removal [total]monthly average minimum≥ 85 %all year001
BOD, percent removal [total]monthly average minimum≥ 85 %all year001
Coliform, fecal generalmonthly geometric mean≤ 100 #/100mLall year001
Coliform, fecal generalmonthly geometric mean≤ 100 #/100mLall year001
Coliform, fecal generalweekly geometric mean≤ 200 #/100mLall year001
Coliform, fecal generalweekly geometric mean≤ 200 #/100mLall year001
Flowmaximumreport only (gal/d) (alert, not enforceable)all year001
Flowmaximumreport only (gal/d) (alert, not enforceable)all year001
Flowmonthly averagereport 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
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. 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
BOD, 5-day, 20 deg. Cweekly averagereport only (mg/L) (alert, not enforceable)all yearIN1
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d) (alert, not enforceable)all yearIN1
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d) (alert, not enforceable)all yearIN1
BOD, 5-day, 20 deg. Cweekly averagereport only (lb/d) (alert, not enforceable)all yearIN1
BOD, 5-day, 20 deg. Cweekly averagereport only (lb/d) (alert, not enforceable)all yearIN1
Solids, total suspendedmonthly 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
Solids, total suspendedweekly averagereport only (mg/L) (alert, not enforceable)all yearIN1
Solids, total suspendedmonthly averagereport only (lb/d) (alert, not enforceable)all yearIN1
Solids, total suspendedmonthly averagereport only (lb/d) (alert, not enforceable)all yearIN1
Solids, total suspendedweekly averagereport only (lb/d) (alert, not enforceable)all yearIN1
Solids, total suspendedweekly averagereport only (lb/d) (alert, not enforceable)all yearIN1
Flowmaximumreport only (gal/d) (alert, not enforceable)Jun–NovIN1
Flowmaximumreport only (gal/d) (alert, not enforceable)Jun–NovIN1
Flowmaximumreport only (gal/d) (alert, not enforceable)Jan, Feb, Mar, Apr, May, DecIN1
Flowmaximumreport only (gal/d) (alert, not enforceable)Jan, Feb, Mar, Apr, May, DecIN1
Flowmonthly averagereport only (gal/d) (alert, not enforceable)Jun–NovIN1
Flowmonthly averagereport only (gal/d) (alert, not enforceable)Jun–NovIN1
Flowmonthly averagereport only (gal/d) (alert, not enforceable)Jan, Feb, Mar, Apr, May, DecIN1
Flowmonthly averagereport only (gal/d) (alert, not enforceable)Jan, Feb, Mar, Apr, May, DecIN1

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/WA0021164 · MCP: https://passage-data.com/mcp