Clean Water Act discharge permit · NPDES LA0007439

ENTERGY LOUISIANA LLC - WATERFORD 1 & 2 ELECTRIC GENERATING PLANT, Killona, LA: NPDES LA0007439 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MajorDischarger class
24Pollutants under a numeric limit
0Pollutants with an effluent exceedance

ENTERGY LOUISIANA LLC - WATERFORD 1 & 2 ELECTRIC GENERATING PLANT, held by Entergy Louisiana, LLC- Waterford 1 and 2 Generating Plant, holds NPDES permit LA0007439, which discharges to Forty Arpent Canal/Mississippi Rive. EPA’s file records it issued August 16, 2023 and expiring October 1, 2028. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filed	ENTERGY LOUISIANA LLC - WATERFORD 1 & 2 ELECTRIC GENERATING PLANT
Permittee as filed	Entergy Louisiana, LLC- Waterford 1 and 2 Generating Plant
NPDES ID	LA0007439
Permit status	Effective
Permit type	Individual permit
Discharger class	Major discharger
Facility type	Not a publicly owned treatment works
Issued	August 16, 2023
Expiration date	October 1, 2028
Address	Killona, LA 70057
Receiving water	FORTY ARPENT CANAL/MISSISSIPPI RIVE
Receiving water impaired	303(D) Listed
Subwatershed	Claiborne Island (HUC 080701000105)
SIC	4911 – Electric Services
Other EPA IDs (FRS)	RCRA handler LAD000757468; ICIS-AIR source LA0000002208900014

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.

Effluent limits and exceedances

24Pollutants on file
24Under a numeric limit
16With a violation of any kind
0With an effluent exceedance

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.

Pollutant or measure	Limits	Violations, any kind
LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas	2	34
NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas	2	34
Coef Of Var Static Renewal 48Hr Acute Pimephales promelas	1	32
Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex	2	30
NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex	2	30
Coef Of Var Static Renewal 48Hr Acute D. pulex	1	28
Carbon, tot organic [TOC]	7	17
Flow, in conduit or thru treatment plant	22	13
pH	16	8
Solids, total suspended	14	8
Oil and grease	14	8
Copper, total [as Cu]	2	2
Iron, total [as Fe]	2	2
Lead, total [as Pb]	1	1
Benzene, ethylbenzene, toluene, xylene combination	1	1
Benzene	1	1
Oil & Grease	14	0
Whole effluent toxicity - retest #1	4	0
Whole effluent toxicity - retest #2	4	0
Whole Effluent Toxicity - Retest #3	4	0
Solids, total suspended, non-algal	4	0
Temperature, water deg. fahrenheit	2	0
BTEX	1	0
Chlorine, total residual	1	0

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES LA0007439.

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES LA0007439.

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID LA0007439 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

This public-records page covers Clean Water Act discharge permit NPDES LA0007439 for Entergy Louisiana, LLC's Waterford 1 and 2 Electric Generating Plant in Killona, LA, which is listed as Effective and as a Major Discharger. The page lists 24 pollutants under a numeric limit and 0 pollutants with an effluent exceedance, with the permit issued August 16, 2023 and expiring October 1, 2028.