Clean Water Act discharge permit · NPDES AR0049417
ENTERGY ARKANSAS, LLC - HOT SPRING PLANT, Malvern, AR: NPDES AR0049417 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 17Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
ENTERGY ARKANSAS, LLC - HOT SPRING PLANT, held by Entergy Arkansas, LLC - Hot Spring Plant, holds NPDES permit AR0049417, which discharges to Ouachita R. EPA’s file records it issued May 15, 2018 and expiring June 30, 2023. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | ENTERGY ARKANSAS, LLC - HOT SPRING PLANT |
|---|---|
| Permittee as filed | Entergy Arkansas, LLC - Hot Spring Plant |
| NPDES ID | AR0049417 |
| 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 | May 15, 2018 |
| Expiration date | June 30, 2023 |
| Address | Malvern, AR 72104 |
| Receiving water | OUACHITA R |
| Subwatershed | Black Branch (HUC 080401020105) |
| Other EPA IDs (FRS) | RCRA handler ARR000010272; ICIS-AIR source AR0000000505900229 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 17Pollutants on file
- 17Under a numeric limit
- 11With a violation of any kind
- 3With 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 |
|---|---|---|---|---|---|
| Chlorine, free available | 4 | 21 | 9 | July 31, 2006 | 319% over the limit |
| Solids, total suspended | 4 | 12 | 8 | June 30, 2009 | 358% over the limit |
| pH | 6 | 15 | 1 | December 31, 2002 | |
| Oil & Grease | 8 | 20 | 0 | ||
| Flow, in conduit or thru treatment plant | 6 | 18 | 0 | ||
| Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex | 2 | 2 | 0 | ||
| LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas | 2 | 2 | 0 | ||
| NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex | 2 | 2 | 0 | ||
| NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas | 2 | 2 | 0 | ||
| Coef Of Var Static Renewal 48Hr Acute D. pulex | 2 | 2 | 0 | ||
| Coef Of Var Static Renewal 48Hr Acute Pimephales promelas | 2 | 2 | 0 | ||
| Whole effluent toxicity - retest #1 | 1 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 1 | 0 | 0 | ||
| WET, sublethal retest #1 | 1 | 0 | 0 | ||
| WET, sublethal retest #2 | 1 | 0 | 0 | ||
| Whole Effluent Toxicity - Retest #3 | 1 | 0 | 0 | ||
| Whole Effluent Toxicity, Sub-Lethal Retest #3 | 1 | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES AR0049417.
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.
Watch this permit
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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 AR0049417 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.