GREAT RIVER UTILITY OPERATING CO LLC, OAK PARK SUBDIVISION

NPDES permit MS0032972 · Minor NON-POTW · effective, expires 2031-08-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

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

13values over a limit
0required values missing, on 0 form(s)
0of 4 forms filed late

Last period with anything received: 2026-06-30. Most often over: Nitrogen, ammonia total [as N] (8), BOD, 5-day, 20 deg. C (4), Chlorine, total residual (1).

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among MS permits in EPA's filings — check your permit).

Limits in force (27)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]MINIMUM >= 6 mg/L all year
001Oxygen, dissolved [DO]MINIMUM report only all year
001Oxygen, dissolved [DO]MAXIMUM report only all year
001BOD, 5-day, 20 deg. CMX MO AV <= 10 mg/L all year
001BOD, 5-day, 20 deg. CDAILY MX <= 15 mg/L all year
001BOD, 5-day, 20 deg. CMX MO AV <= 15 lb/d all year
001BOD, 5-day, 20 deg. CDAILY MX <= 22.5 lb/d all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001pHMINIMUM report only all year
001pHMAXIMUM report only all year
001Solids, total suspendedMX MO AV <= 30 mg/L all year
001Solids, total suspendedDAILY MX <= 45 mg/L all year
001Solids, total suspendedMX MO AV <= 45 lb/d all year
001Solids, total suspendedDAILY MX <= 67.5 lb/d all year
001Nitrogen, ammonia total [as N]MX MO AV <= 2 mg/L all year
001Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L all year
001Nitrogen, ammonia total [as N]MX MO AV <= 3 lb/d all year
001Nitrogen, ammonia total [as N]DAILY MX <= 4.5 lb/d all year
001Flow, in conduit or thru treatment plantMX MO AV <= .18 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualMX MO AV <= .011 mg/L all year
001Chlorine, total residualDAILY MX <= .019 mg/L all year
001E. coliMX MO AV <= 126 #/100mL all year
001E. coliDAILY MX <= 410 #/100mL all year
001Sludge settleability 30 minuteMINIMUM report only all year
001Sludge settleability 30 minuteMAXIMUM 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