Entergy Arkansas, Inc.-Independence Plant

NPDES permit AR0037451 · Major NON-POTW · administratively continued, expires 2025-10-31 · 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.

This permit expired on 2025-10-31 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

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

0values over a limit
0required values missing, on 0 form(s)
0of 47 forms filed late

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

Reporting

Reports are due about 25 days after each monitoring period ends (the most common figure among AR permits in EPA's filings — check your permit).

Limits in force (50)

OutfallParameterStatisticLimitMonths
002Temperature, water deg. fahrenheitMO AVG <= 100 deg F all year
002Temperature, water deg. fahrenheitDAILY MX <= 105 deg F all year
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 9 SU all year
002Oil & GreaseMO AVG <= 10 mg/L all year
002Oil & GreaseDAILY MX <= 15 mg/L all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002E. coliMO AVG <= 630 #/100mL Jan, Feb, Mar, Apr, Oct, Nov, Dec
002E. coliDAILY MX <= 2050 #/100mL Jan, Feb, Mar, Apr, Oct, Nov, Dec
002E. coli30DA GEO <= 126 #/100mL May, Jun, Jul, Aug, Sep
002E. coli7 DA GEO <= 410 #/100mL May, Jun, Jul, Aug, Sep
01CBOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
01CBOD, 5-day, 20 deg. CDAILY MX <= 45 mg/L all year
01CSolids, total suspendedMO AVG <= 30 mg/L all year
01CSolids, total suspendedDAILY MX <= 45 mg/L all year
01CFlow, in conduit or thru treatment plantMO AVG report only all year
01CFlow, in conduit or thru treatment plantDAILY MX report only all year
01HpHMINIMUM >= 6 SU all year
01HpHMAXIMUM <= 9 SU all year
01HSolids, total suspendedMO AVG <= 30 mg/L all year
01HSolids, total suspendedDAILY MX <= 50 mg/L all year
01HOil & GreaseMO AVG <= 15 mg/L all year
01HOil & GreaseDAILY MX <= 20 mg/L all year
01HFlow, in conduit or thru treatment plantMO AVG report only all year
01HFlow, in conduit or thru treatment plantDAILY MX report only all year
01IPhosphorus, total [as P]MO AVG <= 5 mg/L all year
01IPhosphorus, total [as P]DAILY MX <= 5 mg/L all year
01IZinc, total recoverableMO AVG <= 1 mg/L all year
01IZinc, total recoverableDAILY MX <= 1 mg/L all year
01IChromium, total recoverableMO AVG <= .2 mg/L all year
01IChromium, total recoverableDAILY MX <= .2 mg/L all year
01IFlow, in conduit or thru treatment plantMO AVG report only all year
01IFlow, in conduit or thru treatment plantDAILY MX report only all year
01IChlorine, free availableMO AVG <= .2 mg/L all year
01IChlorine, free availableDAILY MX <= .5 mg/L all year
01IChlorine, free availableMO AVG <= .53 lb/d all year
01IChlorine, free availableDAILY MX <= 1.32 lb/d 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