Clean Water Act discharge permit · NPDES OK0021903
CITY OF TONKAWA, Tonkawa, OK: NPDES OK0021903 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 4Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
- 0Inspections on file
- 1Formal enforcement actions
CITY OF TONKAWA, held by Tonkawa, City of, holds NPDES permit OK0021903, which discharges to 621000010010_30 Salt Fork R/Arkansas R. EPA’s file records it issued June 14, 2021 and expiring June 30, 2026.
CITY OF TONKAWA, Tonkawa, Oklahoma: Individual permit OK0021903, held by Tonkawa, City of; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued June 14, 2021, term to June 30, 2026, by ODEQ; discharges to 621000010010_30 Salt Fork R/Arkansas R; Sewage Treatment Facilities.
- pH: 2 limits, 40 violations of any kind, 30 effluent exceedances, latest April 30, 2026.
- BOD, 5-day, 20 deg. C: 3 limits, 38 violations of any kind, 23 effluent exceedances, latest April 30, 2025, largest 138% over the limit.
- Flow, in conduit or thru treatment plant: 4 limits, 24 violations of any kind, 8 effluent exceedances, latest June 30, 2026, largest 2,147,483,650% over the limit.
- Solids, total suspended: 3 limits, 17 violations of any kind, 2 effluent exceedances, latest November 30, 2014, largest 24% over the limit.
- September 2, 2026: State CWA Non Penalty AO (State).
- June 1, 2026: Effluent Violations - Unauthorized Discharge (ST6).
- June 1, 2019: Permit Violations - Violation Specified in Comment (ST6).
Oklahoma holds 197 Publicly owned treatment works coverages of this permit type in EPA’s file; 180 were issued before OK0021903.
Coverages issued nearest OK0021903
- May 21, 2021: BRAGGS PWA, Braggs, OK0034444, held by Braggs PWA
- May 25, 2021: WELLSTON PWA, Wellston, OK0032476, held by Wellston PWA
- May 25, 2021: WAGONER COUNTY RWSG & SWM D#4, Coweta, OK0043257, held by Wagoner Co. RWSG and SWMD 4
- May 28, 2021: THOMAS PARK LLC, Kingston, OK0042684, held by Thomas Buncombe Creek MHP
- June 14, 2021: ANTLERS PWA, Antlers, OK0020346, held by Antlers PWA
- June 14, 2021: SPENCER, CITY OF, Jones, OK0022535, held by Spencer, City of
- June 14, 2021: BIG CABIN PUBLIC WORKS AUTH, Big Cabin, OK0031577, held by Big Cabin PWA
- June 21, 2021: UNION CITY WWT FACILITY, Union City, OK0038393, held by Union City Municipal Authority
- July 15, 2021: ERICK, CITY OF, Erick, OK0020745, held by Erick, City of
- July 26, 2021: PORUM PWA, Porum, OK0021636, held by Porum PWA
CITY OF TONKAWA among its neighbors
EPA’s permit file holds 1 discharge permits in the Town of Tonkawa-Salt Fork Arkansas River subwatershed (HUC 110600040808), OK0021903 among them. Its county holds 5, 1 of them major permits; OK0021903 is a minor permit.
Identity
| Facility as filed | CITY OF TONKAWA |
|---|---|
| Permittee as filed | Tonkawa, City of |
| NPDES ID | OK0021903 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | June 14, 2021 |
| Expiration date | June 30, 2026 |
| Issuing agency | ODEQ |
| Address | Tonkawa, OK 74653 |
| Receiving water | 621000010010_30 Salt Fork R/Arkansas R |
| Subwatershed | Town of Tonkawa-Salt Fork Arkansas River (HUC 110600040808) |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
Effluent limits and exceedances
- 4Pollutants on file
- 4Under a numeric limit
- 4With a violation of any kind
- 4With 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 |
|---|---|---|---|---|---|
| pH | 2 | 40 | 30 | April 30, 2026 | |
| BOD, 5-day, 20 deg. C | 3 | 38 | 23 | April 30, 2025 | 138% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 24 | 8 | June 30, 2026 | 2,147,483,650% over the limit |
| Solids, total suspended | 3 | 17 | 2 | November 30, 2014 | 24% over the limit |
Inspections, violations and enforcement
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| June 1, 2026 | Effluent Violations - Unauthorized Discharge | ST6 |
| June 1, 2019 | Permit Violations - Violation Specified in Comment | ST6 |
Inspections
EPA’s inspection file holds no inspection for NPDES OK0021903.
Formal enforcement and penalties
1 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 2, 2026 | State CWA Non Penalty AO | State |
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES OK0021903.
Watch this permit
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Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.