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Clean Water Act discharge permit · NPDES WAL022527

KING COUNTY VASHON WWTP, Seattle, WA: NPDES WAL022527 discharge permit, effluent exceedances, inspections, penalties

KING COUNTY VASHON WWTP, held by King County Vashon WWTP, holds NPDES permit WAL022527. EPA’s file records it issued January 1, 2021 and expiring December 31, 2025.

KING COUNTY VASHON WWTP, Seattle, Washington: Associated permit record WAL022527, held by King County Vashon WWTP; Biosolids; Administratively continued (past its expiration date and still in force until reissued); issued January 1, 2021, term to December 31, 2025.

Washington holds 123 Biosolids coverages of this permit type in EPA’s file; 0 were issued before WAL022527.

Coverages issued nearest WAL022527

KING COUNTY VASHON WWTP among its neighbors

EPA’s permit file holds 103 discharge permits in the Shell Creek-Frontal Puget Sound subwatershed (HUC 171100190203), WAL022527 among them. Its county holds 1,319, 8 of them major permits; WAL022527 is a minor permit.

Other permits in the Shell Creek-Frontal Puget Sound subwatershed (HUC 171100190203)

What the register holds for KING COUNTY VASHON WWTP: its NPDES ID, its permit type and status, its dates, its address in Seattle, Washington. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES WAL022527.

Identity

Facility as filedKING COUNTY VASHON WWTP
Permittee as filedKing County Vashon WWTP
NPDES IDWAL022527
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeAssociated permit record
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramBiosolids
IssuedJanuary 1, 2021
Expiration dateDecember 31, 2025
AddressSeattle, WA 98104
Receiving water impaired303(D) Listed
SubwatershedShell Creek-Frontal Puget Sound (HUC 171100190203)

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES WAL022527.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES WAL022527.

Inspections

EPA’s inspection file holds no inspection for NPDES WAL022527.

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 WAL022527.

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, WAL022527.

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  • One permit holder — $99/month
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Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

What this page shows

Of the 14 biosolids permits in King County, 0.0% have a violation on file. The Shell Creek-Frontal Puget Sound subwatershed contains 103 NPDES permits, including KING COUNTY VASHON WWTP.