City of West Richland

NPDES permit WA0051063 · Minor POTW · effective, expires 2026-10-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
0required values missing, on 0 form(s)
0of 16 forms filed late

Last period with anything received: 2026-07-31.

Reporting

Reports are due about 15 days after each monitoring period ends (the most common figure among WA permits in EPA's filings — check your permit).

Limits in force (42)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeAVERAGE report only (alert) all year
001Temperature, water deg. centigradeMAXIMUM report only (alert) all year
001Oxygen, dissolved [DO]AVERAGE report only (alert) all year
001Oxygen, dissolved [DO]MINIMUM >= 2.9 mg/L (alert) all year
001BOD, 5-day, 20 deg. CAVERAGE <= 10 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 10 mg/L all year
001BOD, 5-day, 20 deg. CAVERAGE <= 125 lb/d all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 125 lb/d all year
001pHMAXIMUM <= 8.5 SU all year
001pHMINIMUM >= 6.5 SU all year
001Solids, total suspendedAVERAGE <= 15 mg/L all year
001Solids, total suspendedWKLY AVG <= 15 mg/L all year
001Solids, total suspendedAVERAGE <= 187.7 lb/d all year
001Solids, total suspendedWKLY AVG <= 187.7 lb/d all year
001Oil and grease, hexane extr methodMAXIMUM report only (alert) all year
001Nitrogen, ammonia total [as N]Single Rdg report only (alert) all year
001Nitrogen, ammonia total [as N]MAXIMUM <= 1 mg/L all year
001Nitrogen, ammonia total [as N]MAXIMUM <= 12.5 lb/d all year
001Nitrogen, Kjeldahl, total [as N]Single Rdg report only (alert) all year
001Nitrogen, Kjeldahl, total [as N]MAXIMUM report only (alert) all year
001Nitrite + Nitrate total [as N]Single Rdg report only (alert) all year
001Nitrite + Nitrate total [as N]MAXIMUM report only (alert) all year
001Phosphorus, total [as P]MAXIMUM report only (alert) all year
001Phosphorus, total [as P]Single Rdg report only (alert) all year
001Phosphorus, dissolved reactive [drp as P]MAXIMUM report only (alert) all year
001Cyanide, total [as CN]Single Rdg report only (alert) all year
001Hardness, total [as CaCO3]MAXIMUM report only (alert) all year
001Total phenolsSingle Rdg report only all year
001Phenolics, totalSingle Rdg report only (alert) all year
001BOD, percent removal [total]MINIMUM >= 85 % all year
001E. coliSingle Rdg report only (alert) all year
001Ultraviolet light transmittanceAVERAGE report only (alert) all year
001Ultraviolet light transmittanceMAXIMUM report only (alert) all year
001Number of operating tubesAVERAGE report only (alert) all year
001Number of operating tubesMAXIMUM report only (alert) all year
001Solids, total dissolvedMAXIMUM report only (alert) all year
001Coliform, fecal generalSingle Rdg report only (alert) all year
001Coliform, fecal generalMO GEOMN <= 100 #/100mL all year
001Coliform, fecal generalWK GEOMN <= 200 #/100mL all year
001FlowAVERAGE report only (alert) all year
001FlowMAXIMUM report only (alert) all year
001Solids, suspended percent removalMINIMUM >= 85 % all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states