The 2019 State Department of Ecology Stormwater Management Manual for Western Washington can be accessed from Ecology's stormwater information website. Under the "Technical Information" heading, you will find a link to the Manual. Hard copy of the Manual can be ordered from Ecology.

As a companion to the Stormwater Manual, the January 2005 Low Impact Development Technical Guidance Manual for Puget Sound is available from the Puget Sound Action Team.