Clean Water Act discharge permit · NPDES LA0007374
ENTERGY OPERATIONS INC - WATERFORD 3 STEAM ELECTRIC STATION, Killona, LA: NPDES LA0007374 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 31Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
ENTERGY OPERATIONS INC - WATERFORD 3 STEAM ELECTRIC STATION, held by Entergy Operations, Inc.- Waterford 3 SES, holds NPDES permit LA0007374, which discharges to 40 Arpent Canal To Mississippi. EPA’s file records it issued August 1, 2017 and expiring September 30, 2022.
ENTERGY OPERATIONS INC - WATERFORD 3 STEAM ELECTRIC STATION, Killona, Louisiana: Individual permit LA0007374, held by Entergy Operations, Inc.- Waterford 3 SES; Administratively continued (past its expiration date and still in force until reissued); issued August 1, 2017, term to September 30, 2022; discharges to 40 ARPENT CANAL TO MISSISSIPPI.
- Oil & Grease: 19 limits, 5 violations of any kind, 4 effluent exceedances, latest May 31, 2025, largest 752% over the limit.
- BOD, 5-day, 20 deg. C: 2 limits, 4 violations of any kind, 4 effluent exceedances, latest March 31, 2026, largest 59% over the limit.
- Solids, total suspended: 21 limits, 14 violations of any kind, 3 effluent exceedances, latest August 31, 2024, largest 22% over the limit.
- pH: 22 limits, 23 violations of any kind, 1 effluent exceedance, latest August 31, 2000.
- Oil and grease: 0 limits, 12 violations of any kind, 1 effluent exceedance, latest February 28, 2002, largest 29% over the limit.
- Coliform, fecal general: 2 limits, 1 violation of any kind, 1 effluent exceedance, latest March 31, 2024, largest 150% over the limit.
- Oxygen demand, chem. [high level] [COD]: 0 limits, 1 violation of any kind, 1 effluent exceedance, latest April 30, 2004, largest 42% over the limit.
- Flow, in conduit or thru treatment plant: 25 limits, 14 violations of any kind, 0 effluent exceedances.
- Coef Of Var Static Renewal 7Day Chronic Pimephales promelas: 3 limits, 6 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex: 0 limits, 6 violations of any kind, 0 effluent exceedances.
- NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex: 0 limits, 6 violations of any kind, 0 effluent exceedances.
- Coef Of Var Static Renewal 48Hr Acute D. pulex: 0 limits, 6 violations of any kind, 0 effluent exceedances.
- Chlorine, free available: 6 limits, 5 violations of any kind, 0 effluent exceedances.
- Carbon, tot organic [TOC]: 5 limits, 5 violations of any kind, 0 effluent exceedances.
- Zinc, total [as Zn]: 5 limits, 5 violations of any kind, 0 effluent exceedances.
- Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 4 violations of any kind, 0 effluent exceedances.
- Pass/Fail Static Renewal 7Day Chronic Pimephales promelas: 2 limits, 4 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 4 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 4 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 4 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 4 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 2 limits, 4 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 4 violations of any kind, 0 effluent exceedances.
- LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas: 0 limits, 4 violations of any kind, 0 effluent exceedances.
- NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas: 0 limits, 4 violations of any kind, 0 effluent exceedances.
- Coef Of Var Static Renewal 48Hr Acute Pimephales promelas: 0 limits, 4 violations of any kind, 0 effluent exceedances.
- Temperature, water deg. fahrenheit: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Chlorine, total residual: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Copper, total [as Cu]: 2 limits, 1 violation of any kind, 0 effluent exceedances.
- Iron, total [as Fe]: 2 limits, 1 violation of any kind, 0 effluent exceedances.
- Thermal Discharge: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Chromium, total [as Cr]: 6 limits, 0 violations of any kind, 0 effluent exceedances.
- Whole effluent toxicity - retest #1: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Whole effluent toxicity - retest #2: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- WET, sublethal retest #1: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- WET, sublethal retest #2: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Whole Effluent Toxicity - Retest #3: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Whole Effluent Toxicity, Sub-Lethal Retest #3: 4 limits, 0 violations of any kind, 0 effluent exceedances.
ENTERGY OPERATIONS INC - WATERFORD 3 STEAM ELECTRIC STATION among its neighbors
EPA’s permit file holds 63 discharge permits in the Claiborne Island subwatershed (HUC 080701000105), LA0007374 among them. Its county holds 70, 15 of them major permits; LA0007374 is a major permit.
Other permits in the Claiborne Island subwatershed (HUC 080701000105)
- ACBL TRANSPORTATION SVCS LLC - CONVENT FACILITY, Convent: LA0069809, minor permit, discharging to MISS RIVER, permit term to December 31, 2012
- AIR LIQUIDE LARGE INDUSTRIES U.S. LP, Geismar: LA0006220, major permit, discharging to SEG 070301 MISSISSIPPI RIVER BASIN, permit term to December 31, 2020
- ALMATIS BURNSIDE LLC, Burnside: LA0005606, major permit, discharging to SEG 070301 MISSISSIPPI RIVER, permit term to May 31, 2015
- AMERICAS STYRENICS, LLC- ST. JAMES PLANT, St. James: LA0029963, major permit, discharging to MISSISSIPPI RIVER, permit term to June 30, 2019
- ARCHER DANIELS MIDLAND CO. - TULANE FLEETING INC, Ama: LA0088609, minor permit, discharging to MISSISSIPPI, permit term to October 31, 2012
- ARMANT FLEET, Vacherie: LA0090182, minor permit, discharging to MISS. RIVER, permit term to June 30, 2009
- ASSOCIATED GRAIN TERMINALS LLC - MYRTLE GROVE MIDSTREAM TERMINAL MGMT FACILITY, Statewide: LA0076368, minor permit, permit term to December 31, 2028
- ASSOCIATED TERMINALS LLC - ALEX G MIDSTREAM LOADER, Convent: LA0120162, minor permit, permit term to June 30, 2010
- ATALCO GRAMERCY LLC - NORANDA ALUMINA - GRAMERCY BULK TERMINAL, Mount Airy: LAG481019, minor permit, permit term to November 30, 2020
- BASF CORP-GEISMAR, Geismar: LA0002950, major permit, discharging to MISSISSIPPI RIVER, permit term to October 31, 2022
Identity
| Facility as filed | ENTERGY OPERATIONS INC - WATERFORD 3 STEAM ELECTRIC STATION |
|---|---|
| Permittee as filed | Entergy Operations, Inc.- Waterford 3 SES |
| NPDES ID | LA0007374 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | August 1, 2017 |
| Expiration date | September 30, 2022 |
| Address | Killona, LA 70057 |
| Receiving water | 40 ARPENT CANAL TO MISSISSIPPI |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Claiborne Island (HUC 080701000105) |
| Other EPA IDs (FRS) | RCRA handler LAD000757450; ICIS-AIR source LA0000002208900091 |
Effluent limits and exceedances
- 39Pollutants on file
- 31Under a numeric limit
- 32With a violation of any kind
- 7With 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 | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Oil & Grease | 19 | 5 | 4 | May 31, 2025 | 752% over the limit |
| BOD, 5-day, 20 deg. C | 2 | 4 | 4 | March 31, 2026 | 59% over the limit |
| Solids, total suspended | 21 | 14 | 3 | August 31, 2024 | 22% over the limit |
| pH | 22 | 23 | 1 | August 31, 2000 | |
| Oil and grease | 0 | 12 | 1 | February 28, 2002 | 29% over the limit |
| Coliform, fecal general | 2 | 1 | 1 | March 31, 2024 | 150% over the limit |
| Oxygen demand, chem. [high level] [COD] | 0 | 1 | 1 | April 30, 2004 | 42% over the limit |
| Flow, in conduit or thru treatment plant | 25 | 14 | 0 | ||
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 3 | 6 | 0 | ||
| Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex | 0 | 6 | 0 | ||
| NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex | 0 | 6 | 0 | ||
| Coef Of Var Static Renewal 48Hr Acute D. pulex | 0 | 6 | 0 | ||
| Chlorine, free available | 6 | 5 | 0 | ||
| Carbon, tot organic [TOC] | 5 | 5 | 0 | ||
| Zinc, total [as Zn] | 5 | 5 | 0 | ||
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 4 | 0 | ||
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 2 | 4 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 4 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 2 | 4 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 4 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 4 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 4 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 4 | 0 | ||
| LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas | 0 | 4 | 0 | ||
| NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas | 0 | 4 | 0 | ||
| Coef Of Var Static Renewal 48Hr Acute Pimephales promelas | 0 | 4 | 0 | ||
| Temperature, water deg. fahrenheit | 2 | 2 | 0 | ||
| Chlorine, total residual | 1 | 2 | 0 | ||
| Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | 1 | 2 | 0 | ||
| Copper, total [as Cu] | 2 | 1 | 0 | ||
| Iron, total [as Fe] | 2 | 1 | 0 | ||
| Thermal Discharge | 1 | 1 | 0 | ||
| Chromium, total [as Cr] | 6 | 0 | 0 | ||
| Whole effluent toxicity - retest #1 | 4 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 4 | 0 | 0 | ||
| WET, sublethal retest #1 | 4 | 0 | 0 | ||
| WET, sublethal retest #2 | 4 | 0 | 0 | ||
| Whole Effluent Toxicity - Retest #3 | 4 | 0 | 0 | ||
| Whole Effluent Toxicity, Sub-Lethal Retest #3 | 4 | 0 | 0 |
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES LA0007374.
Inspections
EPA’s inspection file holds no inspection for NPDES LA0007374.
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES LA0007374.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.