Clean Water Act discharge permit · NPDES OK1000128
ASSOCIATED ELECTRIC COOP-RIPLEY ENERGY CENTER, Stillwater, OK: NPDES OK1000128 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 5Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
ASSOCIATED ELECTRIC COOP-RIPLEY ENERGY CENTER, held by Associated Electric Coop.-Ripley Energy Center, holds NPDES permit OK1000128, which discharges to Ok620900040050_00 Little Stillwater Creek. EPA’s file records it issued August 27, 2025 and expiring September 30, 2030. 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.
What the register holds for ASSOCIATED ELECTRIC COOP-RIPLEY ENERGY CENTER: its NPDES ID, its permit type and status, its dates, its address in Stillwater, Oklahoma, its receiving water, and 5 pollutants under a numeric limit. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES OK1000128.
Identity
| Facility as filed | ASSOCIATED ELECTRIC COOP-RIPLEY ENERGY CENTER |
|---|---|
| Permittee as filed | Associated Electric Coop.-Ripley Energy Center |
| NPDES ID | OK1000128 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | August 27, 2025 |
| Expiration date | September 30, 2030 |
| Issuing agency | OKDEQ |
| Address | Stillwater, OK 74074 |
| Receiving water | OK620900040050_00 Little Stillwater Creek |
| Subwatershed | Little Stillwater Creek (HUC 110500030107) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 5Pollutants on file
- 5Under a numeric limit
- 0With a violation of any kind
- 0With 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 | 0 | 0 | ||
| Solids, total suspended | 2 | 0 | 0 | ||
| Oil and grease, hexane extr method | 2 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 0 | 0 | ||
| Chlorine, total residual | 1 | 0 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES OK1000128.
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 OK1000128.
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, OK1000128.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
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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 OK1000128 there.
Nearby on the register
- Discharge permits in Stillwater
- Every permit record in Stillwater, A to Z
- Discharge permits in Oklahoma
- Every permit record in Oklahoma, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.