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Facility Summary: VASHON STP Close Window

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Facility Information

Facility Name:
VASHON STP
Address:
9615 SW 171st St
City:
Vashon
County:
King
Facility Status:
Active

Permits as of 9/7/2026 - Bold Records Indicate Active Permits

Click the version number to view the permit documents associated with the permit.
Permit NumberTypeVersionEffective DateExpiration Date
WA0022527Municipal NPDES IP 8   
WA0022527Municipal NPDES IP 1 5/15/19855/15/1990
WA0022527Municipal NPDES IP 2 6/29/19906/29/1995
BS0000046Municipal NPDES IP 1 1/1/19931/1/1998
WA0022527Municipal NPDES IP 3 7/1/19964/15/2001
WA0022527Municipal NPDES IP 4 6/1/20025/31/2007
WA0022527Municipal NPDES IP 5 9/1/20068/31/2011
WA0022527Municipal NPDES IP 6 9/1/20118/31/2016
(Active)Municipal NPDES IP 7 3/1/20172/28/2022
WAG994567Puget Sound Nutrient GP 1 4/1/202212/31/2026
Permit NumberViolations/TriggersInspectionsEnforcements
BS0000046
0
0
0
WA0022527
562
35
103
WAG994567
2
1
0
These counts represent "all time". Click to view the details of these values. Links will show only active permits by default.

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Most Recent Interactions (Enforcements, Inspections and Submittals)

Data TypeAction DateDescription
Submittal8/21/2026Permit
Submittal6/12/2026Permit
Submittal3/27/2026Permit
Submittal8/7/2025Permit
Submittal4/30/2025Permit
Inspection10/12/2023Pretreatment Audit
Inspection8/24/2023Compliance Inspection-Without Sampling
Inspection4/29/2019Pretreatment Compliance
Inspection4/25/2018Pretreatment Compliance
Inspection6/28/2017Pretreatment Compliance
Enforcement6/1/2017No enforcement action necessary
Enforcement5/16/2017No enforcement action necessary
Enforcement11/17/2016No enforcement action necessary
Enforcement4/28/2016No enforcement action necessary
Enforcement4/28/2016No enforcement action necessary

Facility Documents

Click on the document name to download and open the document.
Permit NumberPermit VersionDocument TypePermit StatusIssued DatePermit TypeDocument NamePublic Notice DateInfo
WA00225277Permit SubmittalsActive1/16/2017Municipal NPDES IP  Notice of Change in Authorization Received: 08/21/2026
WA00225277Permit SubmittalsActive1/16/2017Municipal NPDES IP  Notice of Change in Authorization Received: 08/21/2026
WA00225278Application DocumentsDraft Municipal NPDES IP  Application
WA00225278Permit DocumentsDraft Municipal NPDES IP  Application
WA00225278Permit DocumentsDraft Municipal NPDES IP  Application
WA00225277Permit SubmittalsActive1/16/2017Municipal NPDES IP 6/12/2026Reporting Permit Violations - Written Report Received: 06/12/2026
WA00225277Permit SubmittalsActive1/16/2017Municipal NPDES IP 6/12/2026Reporting Permit Violations - Written Report Received: 06/12/2026
WA00225277Permit SubmittalsActive1/16/2017Municipal NPDES IP 6/12/2026Reporting Permit Violations - Written Report Received: 06/12/2026
WAG9945671Ecology CommunicationInactive12/1/2021Puget Sound Nutrient GP  Termination/revocation request
WA00225277Permit SubmittalsActive1/16/2017Municipal NPDES IP  Notice of Change in Authorization Received: 08/07/2025
WA00225277Permit SubmittalsActive1/16/2017Municipal NPDES IP  Chronic Toxicity Testing Received: 07/13/2021
WA00225277Permit SubmittalsActive1/16/2017Municipal NPDES IP  Chronic Toxicity Testing Received: 07/13/2021
WA00225275Inspection RelatedInactive8/31/2006Municipal NPDES IP  Pretreatment Compliance Inspection Date: 06/23/2009
WA00225274Inspection RelatedInactive5/31/2002Municipal NPDES IP  Compliance Inspection-With Sampling Date: 08/23/2005
WA00225277Permit SubmittalsActive1/16/2017Municipal NPDES IP 4/30/2025Reporting Permit Violations - Written Report Received: 04/30/2025
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