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Yakima County Public Services

Sewage treatment plant, Buena, Washington. NPDES permit WA0052132 expired Jan 31, 2024; its limits still apply. Last 12 months: over a limit once (last February 2026), 3 of 25 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form MM monthly (17 values), outfall IN1 form MM monthly (9 values), outfall 001 form AA yearly
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 1 required value missing, 0 of 25 reports late

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

Period endingParameterReportedLimitOver by
February 2026Nitrogen, ammonia total [as N], monthly average3.4≤ 3.1 mg/L10%

Limits in force (66)

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]minimumreport only (mg/L) (alert, not enforceable)all year001
Oxygen, dissolved [DO]minimumreport 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≤ 45 lb/dall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 45 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 30 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 30 lb/dall year001
pHmaximum≤ 9 SUall year001
pHmaximum≤ 9 SUall year001
pHminimum≥ 6 SUall year001
pHminimum≥ 6 SUall year001
Alkalinity, total [as CaCO3]single readingreport only (mg/L) (alert, not enforceable)all year001
Alkalinity, total [as CaCO3]single readingreport only (mg/L) (alert, not enforceable)all 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≤ 30 lb/dall year001
Solids, total suspendedmonthly average≤ 30 lb/dall year001
Solids, total suspendedweekly average≤ 45 lb/dall year001
Solids, total suspendedweekly average≤ 45 lb/dall year001
Oil & Greasesingle readingreport only (mg/L) (alert, not enforceable)all year001
Oil & Greasesingle readingreport only (mg/L) (alert, not enforceable)all year001
Nitrogen, ammonia total [as N]monthly average≤ 3.1 mg/Lall year001
Nitrogen, ammonia total [as N]monthly average≤ 3.1 mg/Lall year001
Nitrogen, Kjeldahl, total [as N]single readingreport only (mg/L) (alert, not enforceable)all year001
Nitrogen, Kjeldahl, total [as N]single readingreport only (mg/L) (alert, not enforceable)all year001
Nitrite + Nitrate total [as N]single readingreport only (mg/L) (alert, not enforceable)all year001
Nitrite + Nitrate total [as N]single readingreport only (mg/L) (alert, not enforceable)all year001
Phosphorus, total [as P]single readingreport only (mg/L) (alert, not enforceable)all year001
Phosphorus, total [as P]single readingreport only (mg/L) (alert, not enforceable)all year001
Hardness, total [as CaCO3]single readingreport only (mg/L) (alert, not enforceable)all year001
Hardness, total [as CaCO3]single readingreport only (mg/L) (alert, not enforceable)all year001
Fecal coliform, MPN, EC med, 44.5 Cmonthly geometric mean≤ 200 #/100mLall year001
Fecal coliform, MPN, EC med, 44.5 Cmonthly geometric mean≤ 200 #/100mLall year001
Fecal coliform, MPN, EC med, 44.5 Cweekly geometric mean≤ 400 #/100mLall year001
Fecal coliform, MPN, EC med, 44.5 Cweekly geometric mean≤ 400 #/100mLall year001
BOD, percent removal [total]monthly average minimum≥ 85 %all year001
BOD, percent removal [total]monthly average minimum≥ 85 %all year001
Solids, total dissolvedsingle readingreport only (mg/L) (alert, not enforceable)all year001
Solids, total dissolvedsingle readingreport only (mg/L) (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. 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. 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
Solids, total suspendedaveragereport only (mg/L) (alert, not enforceable)all yearIN1
Solids, total suspendedaveragereport 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
Flowtotalreport only (MGD) (alert, not enforceable)all yearIN1
Flowtotalreport only (MGD) (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/WA0052132 · MCP: https://passage-data.com/mcp