Entergy Operations Inc - Waterford 3 Steam Electric Station

NPDES permit LA0007374 · Major NON-POTW · effective, expires 2030-05-31 · 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

3values over a limit
1required values missing, on 1 form(s)
0of 169 forms filed late

Last period with anything received: 2026-07-31. Most often over: BOD, 5-day, 20 deg. C (3).

Reporting

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

Limits in force (132)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitMO AVG report only all year
001Temperature, water deg. fahrenheitINST MAX <= 118 deg F 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 residualDAILY MX <= 211 lb/d all year
001Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex48HR MIN report only all year
001Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulexMO AV MN report only all year
001LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas48HR MIN report only all year
001LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelasMO AV MN report only all year
001NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex48HR MIN report only all year
001NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulexMO AV MN report only all year
001NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas48HR MIN report only all year
001NOAEC Lethal Static Renewal 48Hr acute Pimephales promelasMO AV MN report only all year
001Coef Of Var Static Renewal 48Hr Acute D. pulexMAXIMUM report only all year
001Coef Of Var Static Renewal 48Hr Acute Pimephales promelasMAXIMUM report only all year
004pHINST MIN >= 6 SU all year
004pHINST MAX <= 9 SU all year
004Solids, total suspendedDAILY MX <= 100 mg/L all year
004Oil & GreaseDAILY MX <= 15 mg/L all year
004Carbon, tot organic [TOC]DAILY MX <= 50 mg/L all year
004Chromium, total [as Cr]MO AVG <= .2 mg/L all year
004Chromium, total [as Cr]DAILY MX <= .2 mg/L all year
004Zinc, total [as Zn]MO AVG <= 1 mg/L all year
004Zinc, total [as Zn]DAILY MX <= 1 mg/L all year
004Flow, in conduit or thru treatment plantMO AVG report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
004Chlorine, free availableMO AVG <= .2 mg/L all year
004Chlorine, free availableDAILY MX <= .5 mg/L all year
005BOD, 5-day, 20 deg. CMO AVG <= 10 mg/L all year
005BOD, 5-day, 20 deg. CDAILY MX <= 15 mg/L all year
005pHINST MIN >= 6 SU all year
005pHINST MAX <= 9 SU all year
005Solids, total suspendedMO AVG <= 15 mg/L all year
005Solids, total suspendedDAILY MX <= 23 mg/L all year
005Flow, in conduit or thru treatment plantMO AVG report only all year
005Flow, in conduit or thru treatment plantDAILY MX report only all year
005Coliform, fecal generalMOAV GEO <= 200 #/100mL all year
005Coliform, fecal generalDAILY MX <= 400 #/100mL all year
1001pHINST MIN >= 6 SU all year
1001pHINST MAX <= 9 SU all year
1001Solids, total suspendedMO AVG <= 30 mg/L all year
1001Solids, total suspendedDAILY MX <= 100 mg/L all year
1001Oil & GreaseMO AVG <= 15 mg/L all year
1001Oil & GreaseDAILY MX <= 20 mg/L all year
1001Flow, in conduit or thru treatment plantMO AVG report only all year
1001Flow, in conduit or thru treatment plantDAILY MX report only all year
101pHINST MIN >= 6 SU all year
101pHINST MAX <= 9 SU all year
101Solids, total suspendedMO AVG <= 30 mg/L all year
101Solids, total suspendedDAILY MX <= 100 mg/L all year
101Oil & GreaseMO AVG <= 15 mg/L all year
101Oil & GreaseDAILY MX <= 20 mg/L all year
101Flow, in conduit or thru treatment plantMO AVG report only all year
101Flow, in conduit or thru treatment plantDAILY MX report only all year
201pHINST MIN >= 6 SU all year
201pHINST MAX <= 9 SU all year
201Solids, total suspendedMO AVG <= 30 mg/L all year
201Solids, total suspendedDAILY MX <= 100 mg/L all year
201Oil & GreaseMO AVG <= 15 mg/L all year
201Oil & GreaseDAILY MX <= 20 mg/L all year
201Flow, in conduit or thru treatment plantMO AVG report only all year
201Flow, in conduit or thru treatment plantDAILY MX report only all year
301Flow, in conduit or thru treatment plantMO AVG report only all year
301Flow, in conduit or thru treatment plantDAILY MX report only all year
401pHINST MIN >= 6 SU all year
401pHINST MAX <= 9 SU all year
401Solids, total suspendedMO AVG <= 30 mg/L all year
401Solids, total suspendedDAILY MX <= 100 mg/L all year
401Oil & GreaseMO AVG <= 15 mg/L all year
401Oil & GreaseDAILY MX <= 20 mg/L all year
401Flow, in conduit or thru treatment plantMO AVG report only all year
401Flow, in conduit or thru treatment plantDAILY MX report only all year
501pHINST MIN >= 6 SU all year
501pHINST MAX <= 9 SU all year
501Solids, total suspendedMO AVG <= 30 mg/L all year
501Solids, total suspendedDAILY MX <= 100 mg/L all year
501Oil & GreaseMO AVG <= 15 mg/L all year
501Oil & GreaseDAILY MX <= 20 mg/L all year
501Carbon, tot organic [TOC]DAILY MX <= 50 mg/L all year
501Flow, in conduit or thru treatment plantMO AVG report only all year
501Flow, in conduit or thru treatment plantDAILY MX report only all year
601pHINST MIN >= 6 SU all year
601pHINST MAX <= 9 SU all year
601Solids, total suspendedMO AVG <= 30 mg/L all year
601Solids, total suspendedDAILY MX <= 100 mg/L all year
601Oil & GreaseMO AVG <= 15 mg/L all year
601Oil & GreaseDAILY MX <= 20 mg/L all year
601Carbon, tot organic [TOC]DAILY MX <= 50 mg/L all year
601Flow, in conduit or thru treatment plantMO AVG report only all year
601Flow, in conduit or thru treatment plantDAILY MX report only all year
701pHINST MIN >= 6 SU all year
701pHINST MAX <= 9 SU all year
701Solids, total suspendedMO AVG <= 30 mg/L all year
701Solids, total suspendedDAILY MX <= 100 mg/L all year
701Oil & GreaseMO AVG <= 15 mg/L all year
701Oil & GreaseDAILY MX <= 20 mg/L all year
701Carbon, tot organic [TOC]DAILY MX <= 50 mg/L all year
701Chromium, total [as Cr]MO AVG <= .2 mg/L all year
701Chromium, total [as Cr]DAILY MX <= .2 mg/L all year
701Zinc, total [as Zn]MO AVG <= 1 mg/L all year
701Zinc, total [as Zn]DAILY MX <= 1 mg/L all year
701Flow, in conduit or thru treatment plantMO AVG report only all year
701Flow, in conduit or thru treatment plantDAILY MX report only all year
701Chlorine, free availableMO AVG <= .2 mg/L all year
701Chlorine, free availableDAILY MX <= .5 mg/L all year
801pHINST MIN >= 6 SU all year
801pHINST MAX <= 9 SU all year
801Solids, total suspendedMO AVG <= 30 mg/L all year
801Solids, total suspendedDAILY MX <= 100 mg/L all year
801Oil & GreaseMO AVG <= 15 mg/L all year
801Oil & GreaseDAILY MX <= 20 mg/L all year
801Carbon, tot organic [TOC]DAILY MX <= 50 mg/L all year
801Zinc, total [as Zn]MO AVG <= 1 mg/L all year
801Zinc, total [as Zn]DAILY MX <= 1 mg/L all year
801Flow, in conduit or thru treatment plantMO AVG report only all year
801Flow, in conduit or thru treatment plantDAILY MX report only all year
801Chlorine, free availableMO AVG <= .2 mg/L all year
801Chlorine, free availableDAILY MX <= .5 mg/L all year
901pHINST MIN >= 6 SU all year
901pHINST MAX <= 9 SU all year
901Solids, total suspendedMO AVG <= 30 mg/L all year
901Solids, total suspendedDAILY MX <= 100 mg/L all year
901Oil & GreaseMO AVG <= 15 mg/L all year
901Oil & GreaseDAILY MX <= 20 mg/L all year
901Copper, total [as Cu]MO AVG <= 1 mg/L all year
901Copper, total [as Cu]DAILY MX <= 1 mg/L all year
901Iron, total [as Fe]MO AVG <= 1 mg/L all year
901Iron, total [as Fe]DAILY MX <= 1 mg/L all year
901Flow, in conduit or thru treatment plantMO AVG report only all year
901Flow, in conduit or thru treatment plantDAILY MX report only all year
IT01Flow, in conduit or thru treatment plantMO AVG report only all year
IT01Flow, in conduit or thru treatment plantDAILY 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