Clean Water Act discharge permit · NPDES WA0023281
WILKESON STP, Wilkeson, WA: NPDES WA0023281 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
WILKESON STP, held by TOWN OF WILKESON, holds NPDES permit WA0023281. EPA’s file records it issued July 1, 2010 and expiring July 31, 2015. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | WILKESON STP |
|---|---|
| Permittee as filed | TOWN OF WILKESON |
| NPDES ID | WA0023281 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | July 1, 2010 |
| Expiration date | July 31, 2015 |
| Issuing agency | State |
| Address | Wilkeson, WA 98396 |
| Subwatershed | Wilkeson Creek (HUC 171100140103) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 15Pollutants on file
- 0Under a numeric limit
- 15With 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 |
|---|---|---|---|---|---|
| Solids, suspended percent removal | 0 | 9 | 7 | December 31, 2024 | 93% over the limit |
| Solids, total suspended | 0 | 17 | 1 | January 31, 2022 | 22% over the limit |
| Nitrogen, ammonia total [as N] | 0 | 5 | 1 | December 31, 2013 | 71% over the limit |
| Coliform, fecal general | 0 | 5 | 1 | December 31, 2024 | 21% over the limit |
| pH | 0 | 114 | 0 | ||
| BOD, percent removal [total] | 0 | 91 | 0 | ||
| Temperature, water deg. centigrade | 0 | 37 | 0 | ||
| BOD, 5-day, 20 deg. C | 0 | 32 | 0 | ||
| Flow | 0 | 8 | 0 | ||
| Rainfall | 0 | 4 | 0 | ||
| Nitrogen, nitrite total [as N] | 0 | 3 | 0 | ||
| Nitrogen, nitrate total [as N] | 0 | 3 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 0 | 3 | 0 | ||
| Phosphate, total [as PO4] | 0 | 3 | 0 | ||
| Phosphorus, total [as P] | 0 | 3 | 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 WA0023281.
Velarion’s copy of EPA’s ICIS-NPDES files does not yet 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, WA0023281.
Start the watch
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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 WA0023281 there.
Nearby on the register
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- Every permit record in Wilkeson, A to Z
- Discharge permits in Washington
- Every permit record in Washington, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.