Clean Water Act discharge permit · NPDES WA0052396
TIETON POTW, Cowiche, WA: NPDES WA0052396 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
TIETON POTW, held by Cowiche Sewer District, holds NPDES permit WA0052396. EPA’s file records it issued February 21, 2008 and expiring March 31, 2013. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | TIETON POTW |
|---|---|
| Permittee as filed | Cowiche Sewer District |
| NPDES ID | WA0052396 |
| 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 | February 21, 2008 |
| Expiration date | March 31, 2013 |
| Issuing agency | State |
| Address | Cowiche, WA 98923 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | North Fork Cowiche Creek (HUC 170300020310) |
| Program components on file | POTW, Pretreatment |
| SIC | 4952 – Sewerage Systems |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 9Pollutants on file
- 0Under a numeric limit
- 9With a violation of any kind
- 1With 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 |
|---|---|---|---|---|---|
| Oxygen, dissolved [DO] | 0 | 16 | 16 | August 31, 2022 | 43% over the limit |
| BOD, percent removal [total] | 0 | 117 | 0 | ||
| Chlorine, total residual | 0 | 32 | 0 | ||
| Alkalinity, total [as CaCO3] | 0 | 4 | 0 | ||
| Hardness, total [as CaCO3] | 0 | 4 | 0 | ||
| SOPP | 0 | 3 | 0 | ||
| Thiabendazole | 0 | 3 | 0 | ||
| Coliform, fecal general | 0 | 2 | 0 | ||
| Temperature, water deg. centigrade | 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 WA0052396.
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
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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 WA0052396 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.