Clean Water Act discharge permit · NPDES WA0024163
GRAND COULEE DAM WWTP, Coulee Dam, WA: NPDES WA0024163 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 10Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
GRAND COULEE DAM WWTP, held by INTERIOR, RECLAMATION, holds NPDES permit WA0024163, which discharges to Columbia River. EPA’s file records it issued June 12, 2006 and expiring June 30, 2011. 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 | GRAND COULEE DAM WWTP |
|---|---|
| Permittee as filed | INTERIOR, RECLAMATION |
| NPDES ID | WA0024163 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Federal facility |
| Issued | June 12, 2006 |
| Expiration date | June 30, 2011 |
| Address | Coulee Dam, WA 99133 |
| Receiving water | COLUMBIA RIVER |
| Subwatershed | Sanderson Creek-Columbia River (HUC 170200050203) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 14Pollutants on file
- 10Under a numeric limit
- 14With a violation of any kind
- 8With 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 |
|---|---|---|---|---|---|
| Chlorine, total residual | 4 | 23 | 19 | March 31, 2015 | 12,400% over the limit |
| BOD, 5-day, 20 deg. C | 6 | 21 | 10 | April 30, 2019 | 189% over the limit |
| Solids, suspended percent removal | 1 | 8 | 6 | September 30, 2014 | 343% over the limit |
| Solids, total suspended | 6 | 17 | 5 | July 31, 2017 | 18% over the limit |
| Coliform, fecal MF, MFC broth, 44.5 C | 2 | 6 | 4 | February 28, 2007 | 300% over the limit |
| BOD, 5-day, percent removal | 1 | 5 | 3 | April 30, 2019 | 153% over the limit |
| Fecal coliform, MPN, EC med, 44.5 C | 0 | 5 | 3 | November 30, 2016 | 228% over the limit |
| pH | 2 | 5 | 1 | October 31, 2006 | |
| Nitrogen, ammonia total [as N] | 1 | 3 | 0 | ||
| Flow, in conduit or thru treatment plant | 1 | 3 | 0 | ||
| Enterococci | 0 | 2 | 0 | ||
| Enterococci: group D, MF trans, M-E, EIA | 1 | 1 | 0 | ||
| Floating solids, waste or visible foam-visual | 0 | 1 | 0 | ||
| Oil and grease visual | 0 | 1 | 0 |
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 WA0024163.
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, WA0024163.
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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 WA0024163 there.
Nearby on the register
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- Every permit record in Coulee Dam, A to Z
- Discharge permits in Washington
- Every permit record in Washington, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.