Clean Water Act discharge permit · NPDES AR0050024
NORTHWEST ARKANSAS CONSERVATION AUTHORITY -REGIONAL WWTP, Bentonville, AR: NPDES AR0050024 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 20Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
NORTHWEST ARKANSAS CONSERVATION AUTHORITY -REGIONAL WWTP, held by NORTHWEST AR CONSERVATION AUTHORITY, holds NPDES permit AR0050024, which discharges to Osage Cr, Illinois R. EPA’s file records it issued August 28, 2012 and expiring August 31, 2017. 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 | NORTHWEST ARKANSAS CONSERVATION AUTHORITY -REGIONAL WWTP |
|---|---|
| Permittee as filed | NORTHWEST AR CONSERVATION AUTHORITY |
| NPDES ID | AR0050024 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | August 28, 2012 |
| Expiration date | August 31, 2017 |
| Address | Bentonville, AR 72712 |
| Receiving water | OSAGE CR, ILLINOIS R |
| Subwatershed | Spring Branch-Spavinaw Creek (HUC 110702090304) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 26Pollutants on file
- 20Under a numeric limit
- 25With 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 |
|---|---|---|---|---|---|
| Phosphorus, total [as P] | 7 | 240 | 160 | July 31, 2026 | 12,300% over the limit |
| Nitrogen, ammonia total [as N] | 6 | 114 | 21 | October 31, 2025 | 1,418% over the limit |
| Solids, total suspended | 3 | 86 | 20 | May 31, 2025 | 742% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 3 | 66 | 16 | September 30, 2025 | 347% over the limit |
| Coliform, fecal general | 4 | 43 | 11 | December 31, 2024 | 384% over the limit |
| Oxygen, dissolved [DO] | 4 | 19 | 3 | March 31, 2026 | 10% over the limit |
| pH | 2 | 32 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 32 | 0 | ||
| Nitrite + Nitrate total [as N] | 3 | 2 | 0 | ||
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 3 | 2 | 0 | ||
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 3 | 2 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 3 | 2 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 3 | 2 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 3 | 2 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 3 | 2 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 3 | 2 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 3 | 2 | 0 | ||
| Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | 3 | 2 | 0 | ||
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 3 | 2 | 0 | ||
| Whole effluent toxicity - retest #1 | 0 | 1 | 0 | ||
| Whole effluent toxicity - retest #2 | 0 | 1 | 0 | ||
| WET, sublethal retest #1 | 0 | 1 | 0 | ||
| WET, sublethal retest #2 | 0 | 1 | 0 | ||
| Whole Effluent Toxicity - Retest #3 | 0 | 1 | 0 | ||
| Whole Effluent Toxicity, Sub-Lethal Retest #3 | 0 | 1 | 0 | ||
| Temperature, water deg. fahrenheit | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES AR0050024.
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 AR0050024 there.
Nearby on the register
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- Every permit record in Arkansas, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.