Vashon-Maury Island ground and surface waters provide all of the water needed for residential, commercial and agricultural needs. Water quality on Vashon-Maury Island is generally excellent. All drinking water sources on the island (springs, surface water, and groundwater) are supplied by local precipitation.
On-going water resource monitoring on Vashon-Maury Island is currently being done with the support of the Groundwater Protection Committee and their sustainability indicators.
Learn more about King County and Groundwater Protection Committee efforts to help Vashon Island residents learn about their water resources: