Surface Water Management Division
Countywide Lake Information
|There are approximately 460 lakes in Snohomish County, most of which are very small or located in the Cascade Mountains and foothills. Approximately 60 lakes are located in the populated lowland portions of the County.
Lake Serene Rainbow by Mark Fussell
Water Quality Data
Since 1992, Snohomish County Surface Water Management (SWM) has worked with citizen volunteers to monitor lake water quality in about 40 lowland lakes. Current and historical lake water quality data are available online in SWM's interactive Water Quality Database.
Snohomish County's State of the Lakes Report (2003) summarizes the results of SWM's lake monitoring performed from 1992 through 2002, as well as occasional monitoring from the mid-1970s. In addition, the report contains detailed monitoring summaries for 35 lakes. Annual report update provide updated water quality monitoring information for each individual lake as new monitoring data are collected.
County Lake Maps
Gene Williams, Senior Planner, 425-388-3464 extension 4563
Marisa Burghdoff, Water Quality Specialist, 425-388-3204
Jen Oden, Water Quality Specialist, 425-388-3464 extension 4352
Some of these documents are in pdf format. To read these files you'll need to have Adobe Acrobat Reader installed on your computer.