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
- 1Inspections on file
- 4Formal enforcement actions
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.
STILWELL AREA DEVELOPMENT AUTH, Stilwell, Oklahoma: Individual permit OK0030341, held by Stilwell Area Development Authority; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued December 19, 2019, term to January 31, 2025, by ODEQ; discharges to 121700040010 Caney Creek; Sewage Treatment Facilities.
- Solids, total suspended: 6 limits, 41 violations of any kind, 34 effluent exceedances, latest January 31, 2024, largest 1,327% over the limit.
- E. coli: 4 limits, 27 violations of any kind, 24 effluent exceedances, latest June 30, 2025, largest 4,826% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 9 limits, 17 violations of any kind, 11 effluent exceedances, latest June 30, 2023, largest 85% over the limit.
- Cadmium, total [as Cd]: 3 limits, 24 violations of any kind, 10 effluent exceedances, latest March 31, 2023, largest 6,449% over the limit.
- Nitrogen, ammonia total [as N]: 12 limits, 51 violations of any kind, 9 effluent exceedances, latest March 31, 2024, largest 271% over the limit.
- pH: 6 limits, 32 violations of any kind, 6 effluent exceedances, latest June 30, 2026.
- Oxygen, dissolved [DO]: 2 limits, 7 violations of any kind, 6 effluent exceedances, latest May 31, 2023, largest 27% over the limit.
- Coliform, fecal general: 0 limits, 5 violations of any kind, 5 effluent exceedances, latest May 31, 2016, largest 210% over the limit.
- Phosphorous, total organic [as P]: 3 limits, 10 violations of any kind, 4 effluent exceedances, latest May 31, 2023, largest 3,300% over the limit.
- Chlorine, total residual: 1 limit, 4 violations of any kind, 1 effluent exceedance, latest April 30, 2011, largest 300% over the limit.
- Phosphorus, total [as P]: 0 limits, 4 violations of any kind, 1 effluent exceedance, latest December 31, 2002, largest 1% over the limit.
- %Mortality Static Renewal 7Day Chronic Pimephales Promelas: 2 limits, 19 violations of any kind, 0 effluent exceedances.
- Flow, in conduit or thru treatment plant: 2 limits, 18 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 17 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 17 violations of any kind, 0 effluent exceedances.
- Coef Of Var Static Renewal 7Day Chronic Pimephales promelas: 2 limits, 17 violations of any kind, 0 effluent exceedances.
- %Mortality 7Day Chronic Ceriodaphnia dubia: 1 limit, 16 violations of any kind, 0 effluent exceedances.
- Pass/Fail Static Renewal 7Day Chronic Pimephales promelas: 2 limits, 13 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas: 2 limits, 13 violations of any kind, 0 effluent exceedances.
- Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia: 1 limit, 13 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 1 limit, 12 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 1 limit, 12 violations of any kind, 0 effluent exceedances.
- Solids, total dissolved- 180 deg. C: 4 limits, 11 violations of any kind, 0 effluent exceedances.
- Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia: 1 limit, 9 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia: 1 limit, 9 violations of any kind, 0 effluent exceedances.
- Whole effluent toxicity: 2 limits, 5 violations of any kind, 0 effluent exceedances.
- Polychlorinated biphenyls [PCBs]: 2 limits, 4 violations of any kind, 0 effluent exceedances.
- Toxicity characteristic leaching procedure: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Hardness, total [as CaCO3]: 0 limits, 4 violations of any kind, 0 effluent exceedances.
- Ann. amt sludge disposed by other method: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Annual amt of sludge incinerated: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Annual sludge production, total: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Annual amount of sludge land applied: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Annual amt. sludge disposed surface unit: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Annual amt sludge disposed in landfill: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Annual amt sludge transported interstate: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Compliance w/part 258 sludge requirement: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Arsenic, dry weight: 5 limits, 0 violations of any kind, 0 effluent exceedances.
- Nickel, sludge, total, dry weight [as Ni]: 5 limits, 0 violations of any kind, 0 effluent exceedances.
- Selenium, dry weight: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Copper, dry weight: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Cadmium, dry weight: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Molybdenum, sludge, total, dry weight [as Mo]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Zinc, sludge, total, dry weight [as Zn]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Lead, sludge, total, dry weight [as Pb]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Mercury, sludge, total, dry weight [as Hg]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Chromium, sludge, total, dry weight [as Cr]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Level of pathogen requirements achieved: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Description of pathogen option used: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Vector attraction reduction alternative used: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Whole effluent toxicity - retest #1: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Whole effluent toxicity - retest #2: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual whole sludge application rate: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Unit w/liner/leachate collection system: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Unit boundary to property line distance: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Pollutant table from 503.13: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- September 28, 2026: State Administrative Order of Consent (State).
- September 9, 2026: State CWA Non Penalty AO (State).
- August 26, 2026: Evaluation (S).
- May 27, 2026: State CWA Non Penalty AO (State).
- 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).
- January 14, 2026: State CWA Non Penalty AO (State).
- 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).
Oklahoma holds 197 Publicly owned treatment works coverages of this permit type in EPA’s file; 146 were issued before OK0030341.
Coverages issued nearest OK0030341
- September 2, 2019: LANGLEY PUBLIC WORKS AUTHORITY, Langley, OK0039128, held by Langely PWA
- September 5, 2019: SPIRO MIA, Spiro, OK0027693, held by Spiro Municipal Improvement Authority
- October 11, 2019: LEXINGTON PUBLIC WORKS AUTH, Lexington, OK0022756, held by Lexington PWA
- November 1, 2019: LONE ELM MOBILE HOME PARK, Claremore, OK0037664, held by Lone Elm MHP
- November 4, 2019: OKEMAH UTILITIES AUTHORITY, Okemah, OK0020737, held by Okemah Utilities Authority
- December 23, 2019: THOMAS PWA, Thomas, OK0038971, held by Thomas PWA
- January 10, 2020: ATOKA, CITY OF, Atoka, OK0028576, held by Atoka, City of
- January 10, 2020: POCOLA MUNICIPAL AUTHORITY, Pocola, OK0034134, held by Pocola, Town of
- January 10, 2020: HALE SCOUT RESERVATION- CAMP TOM HALE, Talihina, OK0045764, held by Indian Nations Council-Boy Scouts of America
- January 13, 2020: TEMPLE, TOWN OF, Temple, OK0032514, held by Temple, Town of
STILWELL AREA DEVELOPMENT AUTH among its neighbors
EPA’s permit file holds 2 discharge permits in the Upper Caney Creek subwatershed (HUC 111101030901), OK0030341 among them. Its county holds 3, 1 of them major permits; OK0030341 is a major permit.
Other permits in the Upper Caney Creek subwatershed (HUC 111101030901)
- E-Z MART #550, Stilwell: OKG830049, minor permit, discharging to 121700040010 Stilwell's Storm Drain/Canney Ck, permit term to January 2, 2018
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) |
| Program components on file | Biosolids, POTW, Pretreatment |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
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 |
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 |
Inspections
| Date | What EPA recorded | Agency |
|---|---|---|
| August 26, 2026 | Evaluation | S |
Formal enforcement and penalties
4 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
| Date | What EPA recorded | Agency | Federal penalty | State or local penalty |
|---|---|---|---|---|
| September 28, 2026 | State Administrative Order of Consent | State | ||
| September 9, 2026 | State CWA Non Penalty AO | State | ||
| May 27, 2026 | State CWA Non Penalty AO | State | ||
| January 14, 2026 | State CWA Non Penalty AO | State |
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES OK0030341.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.