2012 Stormwater Management Manual for Western Washington, as Amended in December 2014
2012 Stormwater Management Manual for Western Washington
2005 Stormwater Management Manual for Western Washington
2001 Stormwater Management Manual for Western Washington
1992 Stormwater Management Manual for the Puget Sound Basin
You may order a printed copy or a CD (for a nominal cost) from the Washington State Department of Enterprise Services (DES). Follow the link below to get started:
**Tip: Enter “stormwater” in the search box for a list of documents available with “stormwater” in the title. The available versions of the SWMMWW will be in this list.
If you have questions about ordering the SWMMWW, please call DES at (360) 570-5555. Note that you must follow the links in "The Manuals" section above for errata to the SWMMWW. Printed copies from DES do not include the errata pages.
Ecology is currently planning for upcoming SWMMWW training opportunities. Ecology will update this webpage as information becomes available.
The SWMMWW 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 SWMMWW (or equivalent).
For new and redevelopment projects regulated under the Phase I or Phase II Municipal Stormwater Permits: Contact your local municipality for help determining which SWMMWW (or equivalent) applies to your site.
For work regulated under the Industrial Stormwater General Permit (ISGP), the Construction Stormwater General Permit (CSWGP), the Sand and Gravel General Permit, or the Boatyard General Permit: Contact the Ecology Permit Manager for help determining which SWMMWW (or equivalent) applies to your site.
The following Permits reference the SWMMWW:
You can contact the SWMMWW coordinator, Amanda Heye, directly at email@example.com or at 360-407-6457.
For questions about specific volumes, contact the following Ecology staff:
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