Clean Water Act discharge permit · NPDES OK0044512
OKLAHOMA STATE UNIVERSITY, Stillwater, OK: NPDES OK0044512 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 7Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
OKLAHOMA STATE UNIVERSITY, held by OSU Water Plant, holds NPDES permit OK0044512, which discharges to 620900040200_00 Cow Creek/Trib/Stillwater Ck. EPA’s file records it issued September 30, 2019 and expiring October 31, 2024.
OKLAHOMA STATE UNIVERSITY, Stillwater, Oklahoma: Individual permit OK0044512, held by OSU Water Plant; Administratively continued (past its expiration date and still in force until reissued); issued September 30, 2019, term to October 31, 2024, by ODEQ; discharges to 620900040200_00 Cow Creek/trib/Stillwater Ck; Water Supply and Irrigation Systems.
- Aluminum, dissolved [as Al]: 6 limits, 93 violations of any kind, 68 effluent exceedances, latest July 31, 2023, largest 291% over the limit.
- Solids, total suspended: 6 limits, 55 violations of any kind, 30 effluent exceedances, latest January 31, 2021, largest 1,185% over the limit.
- Manganese, dissolved [as Mn]: 6 limits, 29 violations of any kind, 4 effluent exceedances, latest March 31, 2024, largest 400% over the limit.
- Iron, dissolved [as Fe]: 6 limits, 27 violations of any kind, 2 effluent exceedances, latest March 31, 2024, largest 400% over the limit.
- pH: 4 limits, 16 violations of any kind, 0 effluent exceedances.
- Chlorine, total residual: 2 limits, 14 violations of any kind, 0 effluent exceedances.
- Flow, in conduit or thru treatment plant: 4 limits, 8 violations of any kind, 0 effluent exceedances.
- Nitrogen, ammonia total [as N]: 0 limits, 8 violations of any kind, 0 effluent exceedances.
OKLAHOMA STATE UNIVERSITY among its neighbors
EPA’s permit file holds 1 discharge permits in the Harrington Creek-Stillwater Creek subwatershed (HUC 110500030104), OK0044512 among them. Its county holds 10, 0 of them major permits; OK0044512 is a minor permit.
Identity
| Facility as filed | OKLAHOMA STATE UNIVERSITY |
|---|---|
| Permittee as filed | OSU Water Plant |
| NPDES ID | OK0044512 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | September 30, 2019 |
| Expiration date | October 31, 2024 |
| Issuing agency | ODEQ |
| Address | Stillwater, OK 74078 |
| Receiving water | 620900040200_00 Cow Creek/trib/Stillwater Ck |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Harrington Creek-Stillwater Creek (HUC 110500030104) |
| NAICS | 221310 – Water Supply and Irrigation Systems |
| SIC | 4941 – Water Supply |
| Other EPA IDs (FRS) | RCRA handler OKD000829465; ICIS-AIR source OK0000004011900021 |
Effluent limits and exceedances
- 8Pollutants on file
- 7Under a numeric limit
- 8With 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 |
|---|---|---|---|---|---|
| Aluminum, dissolved [as Al] | 6 | 93 | 68 | July 31, 2023 | 291% over the limit |
| Solids, total suspended | 6 | 55 | 30 | January 31, 2021 | 1,185% over the limit |
| Manganese, dissolved [as Mn] | 6 | 29 | 4 | March 31, 2024 | 400% over the limit |
| Iron, dissolved [as Fe] | 6 | 27 | 2 | March 31, 2024 | 400% over the limit |
| pH | 4 | 16 | 0 | ||
| Chlorine, total residual | 2 | 14 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 8 | 0 | ||
| Nitrogen, ammonia total [as N] | 0 | 8 | 0 |
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES OK0044512.
Inspections
EPA’s inspection file holds no inspection for NPDES OK0044512.
Formal enforcement and penalties
0 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.
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES OK0044512.
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- Discharge permits in Stillwater
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.