Seattle Water Intelligence
Washington · 737,015 residentsSeattle's water supply comes from the Cedar and Tolt River watersheds in the Cascade Mountains, with extensive legal protection.
Cedar & Tolt River watersheds
200
Assets Mapped
71.1
Avg WIS
3
Asset Types
60km
Radius
About Water Supply in Seattle
Seattle's water supply comes from the Cedar and Tolt River watersheds in the Cascade Mountains, with extensive legal protection.
Hi3 Water tracks 200 water assets within 60km of Seattle, including springs, wells, aquifers, and water rights transactions. The average Water Intelligence Score in this area is 71.1/100. The most common asset type is Spring (101 assets).
Data sources: USGS, EPA, state water boards. Report last updated: June 28, 2026.
Water Assets Near Seattle
Top Water Assets Near Seattle
Ranked by Water Intelligence Score (WIS)
- 1
Ci — Ce S2-28039
Spring1,795 GPM76WIS - 2
Dm Fs — Ce S1-*08944Cwris
Spring2,693 GPM76WIS - 3
Dm Fs — Ce S2-*08147Cwris
Spring3,591 GPM76WIS - 4
Ci Mu — Ap S1-28050
Spring2,244 GPM76WIS - 5
Mu — Ce S2-*01990Bhcwris
Spring4,291 GPM76WIS - 6
Po — Ce S2-25751Cwris
Spring17,953 GPM76WIS - 7
Mu — Ce S1-*03533Cwris
Spring2,244 GPM76WIS - 8
Fs — Ce S1-*21399Cwris
Spring4,040 GPM76WIS - 9
Ci — Ce S1-*18262Cwris
Spring2,020 GPM76WIS - 10
Ci Dm — Ce S1-*01933C
Spring6,733 GPM76WIS
Explore Seattle on the Interactive Map
View all water assets within 60km of Seattle, including aquifer boundaries, water rights, drought status, and regulatory alerts.