Western Washington municipal stormwater resources


2012 LID Technical guidance Manual for puget sound



WSU Puyallup Research & Extension Center and the Puget Sound Partnership are pleased to announce the 2012 LID Technical Guidance Manual for Puget Sound. The new manual incorporates new information and results of recent research regarding the LID approach and techniques appropriate to the Puget Sound region. To download the new manual, please click here.

Building Cities in the Rain
A project of the South Central Caucus Group to develop recommendations for incentives and cost-effective approaches to encouraging infill development within urban centers while addressing stormwater requirements that can inform comprehensive plan policy and development regulations as part of the Growth Management Act periodic updates starting in 2015.

Click here for more information about the project.

Western Washington Stormwater Groups


ROAD MAP (Regional Operations and Maintenance Program)
Permit requirements for municipal Operation and Maintenance, good housekeeping and Illicit Discharge Detection and Elimination (includes Western Washington and Southwest Washington Permittees).

Contact: Luanne Coachman, King County Stormwater Services

Phase II Coordinators Group
Information sharing and networking covering a wide-range of permit-related topics with various attendees including Western and Southwest Washington Permittees.

Contact: Don Robinett, City of SeaTac

Southwest Washington Coordinators Forum
Information sharing and networking covering a wide-range of permit-related topics in Southwest Washington (primarily communities from Aberdeen to Washougal).

Contact: Kim Ashmore, Centralia

West Sound Stormwater Manager's Coordination Group
Phase II permit compliance and related topics (primarily in West Sound communities on the Kitsap Peninsula).

Contact: Anja Hart, City of Poulsbo

STORM (Stormwater Outreach for Regional Municipalities)
Stormwater outreach and education around the Puget Sound, including evaluation.

Contact: Janet Geer, King County

South Sound Phase II Coordinator's Group
Pierce County, City of Tacoma and neighboring Phase II permittees meet bi-monthly to share Public Education and Outreach resources and NPDES compliance related topics and information.

Contact: Kurt Fremont, City of Tacoma

You can visit this Ecology webpage for more information on these stormwater groups.

Department of Ecology 2012 Stormwater Management Manual for Western Washington (SWMMWW)


In 2011, the SWMMWW 2005 manual was updated. The Stormwater Management Manual for Western Washington is a guidance document. By itself, it is not a legally enforceable document. However, several of the NPDES Stormwater General Permits do require the use of the Manual. The changes to the SWMMWW apply to certain western Washington NPDES permittees.

Click here for more information on the document in general, including affect NPDES Stormwater General Permit permittees.

Acrobat PDF format of the entire manual (Number of pages: 1039) (Publication Size: 20663KB)

Errata (4 pages) (164KB)

Volume I - Minimum Technical Requirements and Site Planning (185 pages) (1MB)

Volume II - Construction Stormwater Pollution Prevention (193 pages) (3MB)

Volume III - Hydrologic Analysis and Flow Control BMPs (175 pages) (3MB)

Volume IV - Source control BMPs (150 pages) (1MB)

Volume V - Runoff Treatment BMPs (301 pages) (8MB)