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City of Tekoa

Sewage treatment plant, Tekoa, Washington. NPDES permit WA0023141 expired May 31, 2019; its limits still apply. Last 12 months: over a limit 19 times (last August 2026), 2 required values missing, 2 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form MM monthly (25 values), outfall IN1 form MM monthly (10 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
8 values over a limit, 5 required values missing, 3 of 24 reports late

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

All 19 values over a limit
Period endingParameterReportedLimitOver by
March 2026Flow, monthly average.220903≤ .2 MGD10%
March 2026Nitrogen, ammonia total [as N], maximum2.8≤ 2.4 mg/L17%
March 2026Nitrogen, ammonia total [as N], monthly average2.8≤ 1.3 mg/L115%
March 2026Solids, suspended percent removal, monthly average minimum49.81≥ 85 %235%
March 2026Solids, total suspended, monthly average40.15≤ 30 mg/L34%
March 2026Solids, total suspended, monthly average52.91≤ 34.5 lb/d53%
March 2026Solids, total suspended, weekly average148≤ 45 mg/L229%
March 2026Solids, total suspended, weekly average188.85≤ 51.7 lb/d265%
May 2026Nitrogen, ammonia total [as N], maximum3.55≤ 2.4 mg/L48%
May 2026Nitrogen, ammonia total [as N], monthly average3.55≤ 1.3 mg/L173%
June 2026Nitrogen, ammonia total [as N], maximum18.5≤ 2.4 mg/L671%
June 2026Nitrogen, ammonia total [as N], monthly average18.5≤ 1.3 mg/L1323%
June 2026Solids, suspended percent removal, monthly average minimum80.01≥ 85 %33%
June 2026Solids, total suspended, monthly average36.47≤ 34.5 lb/d6%
June 2026Solids, total suspended, monthly average37.175≤ 30 mg/L24%
June 2026Solids, total suspended, weekly average64.4≤ 45 mg/L43%
June 2026Solids, total suspended, weekly average69.29≤ 51.7 lb/d34%
August 2026Chlorine, total residual, maximum20≤ 19 ug/L5%
August 2026Chlorine, total residual, monthly average15.2381≤ 4 ug/L281%

Limits in force (76)

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]maximumreport only (mg/L) (alert, not enforceable)all year001
Oxygen, dissolved [DO]maximumreport only (mg/L) (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≤ 34.5 lb/dall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 34.5 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 51.7 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 51.7 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 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≤ 34.5 lb/dall year001
Solids, total suspendedmonthly average≤ 34.5 lb/dall year001
Solids, total suspendedweekly average≤ 51.7 lb/dall year001
Solids, total suspendedweekly average≤ 51.7 lb/dall year001
Nitrogen, total [as N]maximumreport only (mg/L) (alert, not enforceable)all year001
Nitrogen, total [as N]maximumreport only (mg/L) (alert, not enforceable)all year001
Nitrogen, ammonia total [as N]maximum≤ 2.4 mg/Lall year001
Nitrogen, ammonia total [as N]maximum≤ 2.4 mg/Lall year001
Nitrogen, ammonia total [as N]monthly average≤ 1.3 mg/Lall year001
Nitrogen, ammonia total [as N]monthly average≤ 1.3 mg/Lall 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
Phosphorus, total [as P]maximumreport only (mg/L) (alert, not enforceable)all year001
Phosphorus, total [as P]maximumreport only (mg/L) (alert, not enforceable)all year001
Phosphorus, dissolved reactive [drp as P]maximumreport only (mg/L) (alert, not enforceable)all year001
Phosphorus, dissolved reactive [drp as P]maximumreport only (mg/L) (alert, not enforceable)all year001
Chlorine, total residualmaximum≤ 19 ug/Lall year001
Chlorine, total residualmaximum≤ 19 ug/Lall year001
Chlorine, total residualmonthly average≤ 4 ug/Lall year001
Chlorine, total residualmonthly average≤ 4 ug/Lall 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 (MGD)Feb, Mar, Apr, May, Jun, Oct001
Flowmaximumreport only (MGD)Jul–Sep001
Flowmaximumreport only (MGD)Jan, Nov, Dec001
Flowmaximumreport only (MGD) (alert, not enforceable)Jan, Nov, Dec001
Flowmonthly average≤ .2 MGDFeb, Mar, Apr, May, Jun, Oct001
Flowmonthly average≤ .3 MGDJan, Nov, Dec001
Flowmonthly average≤ .2 MGDFeb, Mar, Apr, May, Jun, Oct001
Flowmonthly average≤ .14 MGDJul–Sep001
Flowmonthly average≤ .3 MGDJan, Nov, Dec001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
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. 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. 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. 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
Solids, total suspendedmaximumreport only (mg/L) (alert, not enforceable)all yearIN1
Solids, total suspendedmaximumreport only (mg/L) (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 suspendedmaximumreport only (lb/d) (alert, not enforceable)all yearIN1
Solids, total suspendedmaximumreport only (lb/d) (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
Nitrogen, Kjeldahl, total [as N]maximumreport only (mg/L) (alert, not enforceable)all yearIN1
Nitrogen, Kjeldahl, total [as N]maximumreport only (mg/L) (alert, not enforceable)all yearIN1
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L) (alert, not enforceable)all yearIN1
Nitrogen, Kjeldahl, total [as N]monthly 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.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/WA0023141 · MCP: https://passage-data.com/mcp