Marion, City of

NPDES permit AR0021971 · Major POTW · effective, expires 2028-12-31 · 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

12values over a limit
54required values missing, on 4 form(s)
7of 16 forms filed late

Last period with anything received: 2026-07-31. Most often over: BOD, 5-day, 20 deg. C (12).

Reporting

Reports are due about 25 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (32)

OutfallParameterStatisticLimitMonths
002Oxygen, dissolved [DO]INST MIN >= 2 mg/L all year
002BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
002BOD, 5-day, 20 deg. C7 DA AVG <= 45 mg/L all year
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedMO AVG <= 90 mg/L all year
002Solids, total suspended7 DA AVG <= 135 mg/L all year
002Nitrite + Nitrate total [as N]MO AVG report only all year
002Nitrite + Nitrate total [as N]7 DA AVG report only all year
002Phosphorus, total [as P]MO AVG report only all year
002Phosphorus, total [as P]7 DA AVG report only all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX <= 4.5 MGD all year
002Chlorine, total residualINST MAX report only all year
002Coliform, fecal general30DA GEO <= 200 #/100mL May, Jun, Jul, Aug, Sep
002Coliform, fecal general30DA GEO <= 1000 #/100mL Jan, Feb, Mar, Apr, Oct, Nov, Dec
002Coliform, fecal general7 DA GEO <= 400 #/100mL May, Jun, Jul, Aug, Sep
002Coliform, fecal general7 DA GEO <= 2000 #/100mL Jan, Feb, Mar, Apr, Oct, Nov, Dec
002OverflowsMO TOTAL report only all year
002Overflow volume [SS0 volume, CSO volume]MO TOTAL report only all year
TX2Whole effluent toxicity - retest #148HR MIN report only all year
TX2Whole effluent toxicity - retest #248HR MIN report only all year
TX2WET, sublethal retest #148HR MIN report only all year
TX2WET, sublethal retest #248HR MIN report only all year
TX2Whole Effluent Toxicity - Retest #348HR MIN report only all year
TX2Whole Effluent Toxicity, Sub-Lethal Retest #348HR MIN report only all year
TX2Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex48HR MIN report only all year
TX2LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas48HR MIN report only all year
TX2NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex48HR MIN report only all year
TX2NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas48HR MIN report only all year
TX2Coef Of Var Static Renewal 48Hr Acute D. pulex48HR MIN report only all year
TX2Coef Of Var Static Renewal 48Hr Acute Pimephales promelas48HR MIN 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