Cowlitz County Public Works

NPDES permit WA0023795 · Minor POTW · administratively continued, expires 2011-06-30 · 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 22 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 (26)

OutfallParameterStatisticLimitMonths
001BOD, 5-day, 20 deg. CAVERAGE <= 30 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
001BOD, 5-day, 20 deg. CAVERAGE <= 23 lb/d all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 34 lb/d all year
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedAVERAGE <= 75 mg/L all year
001Solids, total suspendedWKLY AVG <= 113 mg/L all year
001Solids, total suspendedAVERAGE <= 56 lb/d all year
001Solids, total suspendedWKLY AVG <= 84 lb/d all year
001Nitrogen, ammonia total [as N]AVERAGE report only (alert) Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]MAXIMUM report only (alert) Jun, Jul, Aug, Sep
001Chlorine, total residualAVERAGE <= 100 ug/L all year
001BOD, percent removal [total]MO AV MN >= 85 % all year
001Coliform, fecal generalGEO MEAN <= 200 #/100mL all year
001Coliform, fecal generalWK GEOMN <= 400 #/100mL all year
001FlowAVERAGE report only (alert) all year
001FlowMAXIMUM report only (alert) all year
INFBOD, 5-day, 20 deg. CAVERAGE report only (alert) all year
INFBOD, 5-day, 20 deg. CMAXIMUM report only (alert) all year
INFBOD, 5-day, 20 deg. CAVERAGE report only (alert) all year
INFBOD, 5-day, 20 deg. CMAXIMUM report only (alert) all year
INFSolids, total suspendedAVERAGE report only (alert) all year
INFSolids, total suspendedMAXIMUM report only (alert) all year
INFSolids, total suspendedAVERAGE report only (alert) all year
INFSolids, total suspendedMAXIMUM report only (alert) 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