Clean Water Act discharge permit · NPDES WAG994355
MELVIN R. SAMPSON COHO FACILITY, Ellensburg, WA: NPDES WAG994355 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 9Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
MELVIN R. SAMPSON COHO FACILITY, held by Confederated Tribes and Bands of the Yakama Nation, holds NPDES permit WAG994355. EPA’s file records it issued August 18, 2021 and expiring September 30, 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 | MELVIN R. SAMPSON COHO FACILITY |
|---|---|
| Permittee as filed | Confederated Tribes and Bands of the Yakama Nation |
| NPDES ID | WAG994355 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | August 18, 2021 |
| Expiration date | September 30, 2026 |
| Issuing agency | State |
| Address | Ellensburg, WA 98926 |
| Subwatershed | Robinson Creek-Yakima River (HUC 170300010507) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 9Pollutants on file
- 9Under a numeric limit
- 9With 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 |
|---|---|---|---|---|---|
| Solids, settleable | 14 | 336 | 0 | ||
| Solids, total suspended | 13 | 313 | 0 | ||
| Flow | 3 | 72 | 0 | ||
| Volume, total | 1 | 27 | 0 | ||
| Biomass, fish | 2 | 24 | 0 | ||
| Fish feed used | 1 | 24 | 0 | ||
| Chlorine, total residual | 1 | 24 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 8 | 0 | ||
| Phosphorus, dissolved reactive [drp as P] | 1 | 8 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES WAG994355.
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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| April 14, 2022 | Monitoring Violations - Analysis not Conducted | ST6 |
| April 14, 2022 | Monitoring Violations - Frequency of Sampling Violation | ST6 |
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.
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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 WAG994355 there.
Nearby on the register
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- Discharge permits in Washington
- Every permit record in Washington, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.