City of St. Helens

NPDES permit OR0020834 · Major NON-POTW · effective, expires 2029-09-30 · 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

4values over a limit
0required values missing, on 0 form(s)
0of 35 forms filed late

Last period with anything received: 2026-07-31. Most often over: BOD, 5-day, 20 deg. C (4).

Reporting

Reports are due about 45 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (64)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeMO AVG report only all year
001Temperature, water deg. centigradeDAILY MX report only all year
001Temperature, water deg. centigradeMX 7D AV report only all year
001Thermal DischargeMO AVG <= 1370 mkcal/day Jun, Jul, Aug, Sep
001BOD, 5-day, 20 deg. CMO AVG <= 45 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 3500 lb/d all year
001BOD, 5-day, 20 deg. CDAILY MX <= 7000 lb/d all year
001BOD, 5-day, 20 deg. CMO AVG report only all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 65 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 5300 lb/d all year
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001pHMO MIN report only all year
001pHMO MAX report only all year
001Solids, total suspendedMO AVG <= 50 mg/L all year
001Solids, total suspendedMO AVG <= 3900 lb/d all year
001Solids, total suspendedDAILY MX <= 7800 lb/d all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedWKLY AVG <= 75 mg/L all year
001Solids, total suspendedWKLY AVG <= 5900 lb/d all year
001Nitrogen, ammonia total [as N]MO MAX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualMO AVG report only all year
001Chlorine, total residualDAILY MX report only all year
001E. coliMO GEO <= 126 #/100mL all year
001E. coliDAILY MX <= 406 #/100mL all year
001E. coliMO GEO <= 126 #/100mL all year
001E. coliDAILY MX report only all year
001BOD, 5-day, percent removalMO AV MN >= 65 % all year
001Solids, suspended percent removalMO AV MN >= 65 % all year
001Chlorine usageMO AVG report only all year
001Chlorine usageDAILY MX report only all year
007Temperature, water deg. centigradeMO AVG report only all year
007Temperature, water deg. centigradeDAILY MX report only all year
007Temperature, water deg. centigradeMX 7D AV report only all year
007Thermal DischargeMO AVG <= 1370 mkcal/day Jun, Jul, Aug, Sep
007BOD, 5-day, 20 deg. CMO AVG <= 45 mg/L all year
007BOD, 5-day, 20 deg. CMO AVG <= 3500 lb/d all year
007BOD, 5-day, 20 deg. CDAILY MX <= 7000 lb/d all year
007BOD, 5-day, 20 deg. CWKLY AVG <= 65 mg/L all year
007BOD, 5-day, 20 deg. CWKLY AVG <= 5300 lb/d all year
007pHDAILY MN >= 6 SU all year
007pHDAILY MX <= 9 SU all year
007Solids, total suspendedMO AVG <= 50 mg/L all year
007Solids, total suspendedMO AVG <= 3900 lb/d all year
007Solids, total suspendedDAILY MX <= 7800 lb/d all year
007Solids, total suspendedWKLY AVG <= 75 mg/L all year
007Solids, total suspendedWKLY AVG <= 5900 lb/d all year
007Nitrogen, ammonia total [as N]MO MAX report only all year
007Flow, in conduit or thru treatment plantMO AVG report only all year
007Flow, in conduit or thru treatment plantDAILY MX report only all year
007Chlorine, total residualMO AVG report only all year
007Chlorine, total residualDAILY MX report only all year
007E. coliMO GEO <= 126 #/100mL all year
007E. coliDAILY MX <= 406 #/100mL all year
007E. coliMO GEO <= 126 #/100mL all year
007E. coliDAILY MX report only all year
007BOD, 5-day, percent removalMO AV MN >= 65 % all year
007Solids, suspended percent removalMO AV MN >= 65 % all year
007Chlorine usageMO AVG report only all year
007Chlorine usageDAILY MX report only 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