Clean Water Act discharge permit · NPDES LA0005843
ENTERGY LOUISIANA, LLC- ROY S. NELSON PLANT, Lake Charles, LA: NPDES LA0005843 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 33Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
ENTERGY LOUISIANA, LLC- ROY S. NELSON PLANT, held by Entergy Louisiana, LLC- Roy S. Nelson Generating Plant, holds NPDES permit LA0005843, which discharges to Houston River. EPA’s file records it issued December 15, 2015 and expiring December 31, 2020. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | ENTERGY LOUISIANA, LLC- ROY S. NELSON PLANT |
|---|---|
| Permittee as filed | Entergy Louisiana, LLC- Roy S. Nelson Generating Plant |
| NPDES ID | LA0005843 |
| 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 | December 15, 2015 |
| Expiration date | December 31, 2020 |
| Address | Lake Charles, LA 70602 |
| Receiving water | HOUSTON RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Richards Lake-Houston River (HUC 080802050405) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 33Pollutants on file
- 33Under a numeric limit
- 22With a violation of any kind
- 6With 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 |
|---|---|---|---|---|---|
| Temperature, water deg. fahrenheit | 4 | 4 | 4 | May 31, 2012 | 2% over the limit |
| Solids, total suspended | 14 | 11 | 3 | May 31, 2005 | 83% over the limit |
| pH | 18 | 5 | 3 | August 31, 2017 | |
| Copper, total [as Cu] | 2 | 12 | 2 | July 31, 2007 | 1,870% over the limit |
| Iron, total [as Fe] | 2 | 12 | 2 | July 31, 2007 | 51,000% over the limit |
| Coliform, fecal general | 2 | 5 | 1 | December 31, 2012 | 1,725% over the limit |
| Flow, in conduit or thru treatment plant | 22 | 16 | 0 | ||
| Carbon, tot organic [TOC] | 9 | 8 | 0 | ||
| Oil and grease | 11 | 7 | 0 | ||
| BOD, 5-day, 20 deg. C | 2 | 4 | 0 | ||
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 3 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 3 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 3 | 0 | ||
| Zinc, total [as Zn] | 4 | 2 | 0 | ||
| Chromium, total [as Cr] | 2 | 2 | 0 | ||
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 2 | 2 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 2 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 2 | 2 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 2 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 2 | 0 | ||
| Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | 1 | 2 | 0 | ||
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 1 | 1 | 0 | ||
| Phenolics, total recoverable | 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 | ||
| Lead, total [as Pb] | 2 | 0 | 0 | ||
| Benzene | 2 | 0 | 0 | ||
| BTEX | 2 | 0 | 0 | ||
| Chlorine, free available | 2 | 0 | 0 |
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
- 3Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| March 13, 2018 | WW Storm Water Non-Construction - Failure to develop any or adequate SWPPP/SWMP | ST6 |
| March 13, 2018 | WW Storm Water Non-Construction - Discharge without a permit | ST6 |
| January 14, 2018 | Permit Violations - Violation Specified in Comment | ST6 |
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 LA0005843 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.