ENTERGY MISSISSIPPI LLC, GERALD ANDRUS PLANT

NPDES permit MS0001261 · Major NON-POTW · effective, expires 2029-09-30 · 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

0values over a limit
0required values missing, on 0 form(s)
0of 45 forms filed late

Last period with anything received: 2026-08-31.

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 (48)

OutfallParameterStatisticLimitMonths
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Flow, in conduit or thru treatment plantMX MO AV report only all year
001Flow, in conduit or thru treatment plantMAXIMUM report only all year
001Chlorine, total residualMO AVG report only all year
001Chlorine, total residualMO MAX <= .5 mg/L all year
001Chlorine, free availableMO AVG report only all year
001Chlorine, free availableMO MAX <= .2 mg/L all year
001Temp. diff. between intake and dischargeMO AVG report only all year
001Temp. diff. between intake and dischargeMO MAX report only all year
001LC50 Static Renewal 48Hr Acute Ceriodaphnia dubiaMINIMUM >= 1 % all year
001LC50 Static Renewal 48Hr Acute Ceriodaphnia dubiaDAILY MX report only all year
002BOD, 5-day, 20 deg. CQRTR AVG <= 30 mg/L all year
002BOD, 5-day, 20 deg. CQB <= 45 mg/L all year
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedQRTR AVG <= 30 mg/L all year
002Solids, total suspendedQB <= 45 mg/L all year
002Flow, in conduit or thru treatment plantQRTR AVG report only all year
002Flow, in conduit or thru treatment plantQB report only all year
002Chlorine, total residualQRTR AVG report only all year
002Chlorine, total residualQB <= .5 mg/L all year
002E. coliQRTR AVG <= 126 #/100mL all year
002E. coliQB <= 410 #/100mL all year
003pHMINIMUM >= 6 SU all year
003pHMAXIMUM <= 9 SU all year
003Solids, total suspendedMO AVG <= 30 mg/L all year
003Solids, total suspendedMO MAX <= 100 mg/L all year
003Oil & GreaseMO AVG <= 15 mg/L all year
003Oil & GreaseMO MAX <= 20 mg/L all year
003Flow, in conduit or thru treatment plantMX WK AV report only all year
003Flow, in conduit or thru treatment plantMO MAX report only all year
003pH range excursions, > 60 minutesMO TOTAL <= 0 occur/mo all year
003pH range excursions, monthly total accumMO TOTAL <= 446 min all year
004pHMINIMUM >= 6 SU all year
004pHMAXIMUM <= 9 SU all year
004Solids, total suspendedMO AVG <= 30 mg/L all year
004Solids, total suspendedMO MAX <= 100 mg/L all year
004Oil & GreaseMO AVG <= 15 mg/L all year
004Oil & GreaseMO MAX <= 20 mg/L all year
004Iron, total recoverableMO AVG <= 1 mg/L all year
004Iron, total recoverableMO MAX <= 1 mg/L all year
004Copper, total recoverableANNL AVG <= 1 mg/L all year
004Copper, total recoverableANNL MAX <= 1 mg/L all year
004Flow, in conduit or thru treatment plantMX MO AV report only all year
004Flow, in conduit or thru treatment plantMO MAX report only all year
004pH range excursions, > 60 minutesMO TOTAL <= 0 occur/mo all year
004pH range excursions, monthly total accumMO TOTAL <= 446 min 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