Clean Water Act discharge permit · NPDES AR0049255
ARKANSAS ELECTRIC COOPERATIVE CORPORATION-HARRY L. OSWALD GENERATING STATION, Wrightsville, AR: NPDES AR0049255 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 25Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
ARKANSAS ELECTRIC COOPERATIVE CORPORATION-HARRY L. OSWALD GENERATING STATION, held by AECC-HARRY L. OSWALD GENERATING STATION, holds NPDES permit AR0049255, which discharges to Trib,Lorance Cr,Pennington Bu,Arkansas R. EPA’s file records it issued March 29, 2017 and expiring April 30, 2022. 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 | ARKANSAS ELECTRIC COOPERATIVE CORPORATION-HARRY L. OSWALD GENERATING STATION |
|---|---|
| Permittee as filed | AECC-HARRY L. OSWALD GENERATING STATION |
| NPDES ID | AR0049255 |
| 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 | March 29, 2017 |
| Expiration date | April 30, 2022 |
| Address | Wrightsville, AR 72206 |
| Receiving water | TRIB,LORANCE CR,PENNINGTON BU,ARKANSAS R |
| Subwatershed | Gar Slough-Arkansas River (HUC 111102070405) |
| NAICS | 221119 – Other Electric Power Generation [2007] |
| SIC | 4911 – Electric Services |
| Other EPA IDs (FRS) | RCRA handler ARR000014449; ICIS-AIR source AR0000000511901380 |
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
- 27Pollutants on file
- 25Under a numeric limit
- 16With a violation of any kind
- 5With 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 | 12 | 79 | 33 | September 30, 2025 | 1,940% over the limit |
| Solids, total suspended | 4 | 31 | 11 | January 31, 2017 | 201% over the limit |
| pH | 8 | 41 | 9 | January 31, 2021 | |
| Chlorine, free available | 8 | 32 | 8 | March 31, 2012 | 275% over the limit |
| Zinc, total recoverable | 8 | 36 | 4 | January 31, 2016 | 150% over the limit |
| Flow, in conduit or thru treatment plant | 8 | 32 | 0 | ||
| Solids, total dissolved | 0 | 30 | 0 | ||
| Chromium, total recoverable | 8 | 20 | 0 | ||
| Oxygen demand, chem. [low level] [COD] | 8 | 18 | 0 | ||
| Coef Of Var Static Renewal 48Hr Acute Pimephales promelas | 2 | 12 | 0 | ||
| LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas | 2 | 11 | 0 | ||
| NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas | 2 | 11 | 0 | ||
| Coef Of Var Static Renewal 48Hr Acute D. pulex | 2 | 11 | 0 | ||
| Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex | 2 | 10 | 0 | ||
| NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex | 2 | 10 | 0 | ||
| Temperature, water deg. centigrade | 0 | 6 | 0 | ||
| Arsenic, total recoverable | 4 | 0 | 0 | ||
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 1 | 0 | 0 | ||
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 1 | 0 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 1 | 0 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 1 | 0 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 1 | 0 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 1 | 0 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 1 | 0 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 1 | 0 | 0 | ||
| Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | 1 | 0 | 0 | ||
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 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 AR0049255.
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
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, AR0049255.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
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 AR0049255 there.
Nearby on the register
- Discharge permits in Wrightsville
- Every permit record in Wrightsville, A to Z
- Discharge permits in Arkansas
- Every permit record in Arkansas, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.