Surface Water Management Division
Maps
Watershed Management Areas/ Clean Water District
(Surface Water Management Service Areas)
Stillaguamish Clean Water District (152 Kb)
Snohomish Watershed Management Area (153 kb)
South County Watershed Management Area (121 kb)
Snohomish County Surface Water Management Districts (114 kb)
Countywide Watersheds and Lakes
Watersheds of Snohomish County
Snohomish County Watersheds (2.7 Mb pdf download)
Watersheds of Central Puget Sound (3.7 Mb pdf download)
Snohomish County relief map (141 kb pdf download)
Major rivers and watersheds of Snohomish County (237 kb pdf download)
Snohomish County Monitored Lakes (873 kb pdf download)
Snohomish County Streams and Landforms (2.9 Mb pdf download)
Snohomish County department maps and GIS data
Water Resource Inventory Areas (Link to State Department of Ecology website)
National topographic maps and aerial photos (Link to U.S. Geologic Survey website)
Fish Distribution
Bull Trout Distribution - Snohomish County (1.62 mb pdf download)
Chinook Salmon Distribution - Snohomish County (1.44 mb pdf download)
Skagit Watershed
Skagit River Watershed Maps
Stillaguamish Watershed
Stillaguamish River Watershed Maps
Jurisdictional boundaries (360 kb pdf download)
Landslide Inventory 1941-1993 (821 kb pdf download)
Wetlands and Potential Wetlands (549 kb pdf download)
Snohomish Watershed
Snohomish River Watershed Maps
Washington State Stream Catalog Maps - Snohomish River Watershed - WRIA 7. Washington State Department of Fisheries. 1975.
Lake Washington Watershed
Lake Washington Watershed Maps
Fish Distribution - Lake Washington, Cedar-Sammamish Watersheds (Link to King County website)
Puget Sound Watershed
Maps of direct tributaries to Puget Sound
The Fine Print
This website contains downloadable materials produced by Snohomish County government in the course of its official duties. Snohomish County disclaims any warranty of merchantability or warranty of fitness of these materials for any particular purpose, either express or implied. No representation or warranty is made concerning the accuracy, currency, completeness or quality of data depicted. Any user of these materials assumes all responsibility for use thereof, and further agrees to hold Snohomish County harmless from and against any damage, loss, or liability arising from any use of the material.