Clean Water Act discharge permit · NPDES WYG720469
WILLOW CREEK MU11 AQUIFER TESTING, (Unknown City), WY: NPDES WYG720469 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 8Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
WILLOW CREEK MU11 AQUIFER TESTING, held by UEC Uranium Corporation, holds NPDES permit WYG720469, which discharges to Powder River (2abww). EPA’s file records it issued July 17, 2025 and expiring July 16, 2026. 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 | WILLOW CREEK MU11 AQUIFER TESTING |
|---|---|
| Permittee as filed | UEC Uranium Corporation |
| NPDES ID | WYG720469 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | July 17, 2025 |
| Expiration date | July 16, 2026 |
| Issuing agency | Wyoming Department of Environmental Quality |
| Address | (Unknown City), WY |
| Receiving water | POWDER RIVER (2ABWW) |
| Subwatershed | Lower Willow Creek (HUC 100902020302) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 8Pollutants on file
- 8Under a numeric limit
- 8With 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 | 6 | 72 | 0 | ||
| Solids, total suspended | 6 | 72 | 0 | ||
| Radium 226, total | 6 | 72 | 0 | ||
| Flow | 6 | 72 | 0 | ||
| Selenium, total [as Se] | 3 | 36 | 0 | ||
| Uranium, total | 3 | 36 | 0 | ||
| Duration | 3 | 36 | 0 | ||
| Solids, total dissolved | 3 | 36 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES WYG720469.
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 WYG720469.
Inspections
EPA’s inspection file holds no inspection for NPDES WYG720469.
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 WYG720469.
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, WYG720469.
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 WYG720469 there.
Nearby on the register
- Discharge permits in (Unknown City)
- Every permit record in (Unknown City), A to Z
- Discharge permits in Wyoming
- Every permit record in Wyoming, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.