Clean Water Act discharge permit · NPDES OK0030341
STILWELL AREA DEVELOPMENT AUTH, Stilwell, OK: NPDES OK0030341 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 53Pollutants under a numeric limit
- 11Pollutants with an effluent exceedance
STILWELL AREA DEVELOPMENT AUTH, held by Stilwell Area Development Authority, holds NPDES permit OK0030341, which discharges to 121700040010 Caney Creek. EPA’s file records it issued December 19, 2019 and expiring January 31, 2025. 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 | STILWELL AREA DEVELOPMENT AUTH |
|---|---|
| Permittee as filed | Stilwell Area Development Authority |
| NPDES ID | OK0030341 |
| 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 | December 19, 2019 |
| Expiration date | January 31, 2025 |
| Issuing agency | ODEQ |
| Address | Stilwell, OK 74960 |
| Receiving water | 121700040010 Caney Creek |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Upper Caney Creek (HUC 111101030901) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 56Pollutants on file
- 53Under a numeric limit
- 37With a violation of any kind
- 11With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 6 | 41 | 34 | January 31, 2024 | 1,327% over the limit |
| E. coli | 4 | 27 | 24 | June 30, 2025 | 4,826% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 9 | 17 | 11 | June 30, 2023 | 85% over the limit |
| Cadmium, total [as Cd] | 3 | 24 | 10 | March 31, 2023 | 6,449% over the limit |
| Nitrogen, ammonia total [as N] | 12 | 51 | 9 | March 31, 2024 | 271% over the limit |
| pH | 6 | 32 | 6 | June 30, 2026 | |
| Oxygen, dissolved [DO] | 2 | 7 | 6 | May 31, 2023 | 27% over the limit |
| Coliform, fecal general | 0 | 5 | 5 | May 31, 2016 | 210% over the limit |
| Phosphorous, total organic [as P] | 3 | 10 | 4 | May 31, 2023 | 3,300% over the limit |
| Chlorine, total residual | 1 | 4 | 1 | April 30, 2011 | 300% over the limit |
| Phosphorus, total [as P] | 0 | 4 | 1 | December 31, 2002 | 1% over the limit |
| %Mortality Static Renewal 7Day Chronic Pimephales Promelas | 2 | 19 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 18 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 17 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 17 | 0 | ||
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 2 | 17 | 0 | ||
| %Mortality 7Day Chronic Ceriodaphnia dubia | 1 | 16 | 0 | ||
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 2 | 13 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 2 | 13 | 0 | ||
| Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | 1 | 13 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 1 | 12 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 1 | 12 | 0 | ||
| Solids, total dissolved- 180 deg. C | 4 | 11 | 0 | ||
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 1 | 9 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 1 | 9 | 0 | ||
| Whole effluent toxicity | 2 | 5 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 2 | 4 | 0 | ||
| Toxicity characteristic leaching procedure | 1 | 4 | 0 | ||
| Hardness, total [as CaCO3] | 0 | 4 | 0 | ||
| Ann. amt sludge disposed by other method | 1 | 3 | 0 | ||
| Annual amt of sludge incinerated | 1 | 3 | 0 | ||
| Annual sludge production, total | 1 | 3 | 0 | ||
| Annual amount of sludge land applied | 1 | 3 | 0 | ||
| Annual amt. sludge disposed surface unit | 1 | 3 | 0 | ||
| Annual amt sludge disposed in landfill | 1 | 3 | 0 | ||
| Annual amt sludge transported interstate | 1 | 3 | 0 | ||
| Compliance w/part 258 sludge requirement | 1 | 2 | 0 | ||
| Arsenic, dry weight | 5 | 0 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 5 | 0 | 0 | ||
| Selenium, dry weight | 3 | 0 | 0 | ||
| Copper, dry weight | 3 | 0 | 0 | ||
| Cadmium, dry weight | 3 | 0 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 0 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 0 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 0 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 0 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 2 | 0 | 0 | ||
| Level of pathogen requirements achieved | 2 | 0 | 0 | ||
| Description of pathogen option used | 2 | 0 | 0 | ||
| Vector attraction reduction alternative used | 2 | 0 | 0 | ||
| Whole effluent toxicity - retest #1 | 1 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 1 | 0 | 0 | ||
| Annual whole sludge application rate | 1 | 0 | 0 | ||
| Unit w/liner/leachate collection system | 1 | 0 | 0 | ||
| Unit boundary to property line distance | 1 | 0 | 0 | ||
| Pollutant table from 503.13 | 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
- 18Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| May 11, 2026 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| May 11, 2026 | Biosolids: Other Management Practice Violation | ST6 |
| April 20, 2026 | Effluent Violations - Unapproved Bypass | ST6 |
| March 9, 2026 | Effluent Violations - Unapproved Bypass | ST6 |
| March 5, 2026 | Effluent Violations - Unapproved Bypass | ST6 |
| August 12, 2024 | Effluent Violations - Unapproved Bypass | ST6 |
| May 7, 2024 | Effluent Violations - Unapproved Bypass | ST6 |
| April 29, 2024 | Effluent Violations - Unapproved Bypass | ST6 |
| March 12, 2024 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| April 13, 2023 | Permit Violations - Violation Specified in Comment | ST6 |
| March 2, 2023 | Permit Violations - Violation Specified in Comment | ST6 |
| March 2, 2023 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| March 2, 2023 | Management Practice Violations - Failure to Maintain Records | ST6 |
| March 2, 2023 | Biosolids: Other Management Practice Violation | ST6 |
| March 2, 2023 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| March 2, 2022 | Permit Violations - Violation Specified in Comment | ST6 |
| November 28, 2018 | Permit Violations - Violation Specified in Comment | ST6 |
| November 7, 2017 | 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.
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, OK0030341.
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 OK0030341 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.