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: October 16, 2026.
Water Assets Near Seattle
Top Water Assets Near Seattle
Ranked by Water Intelligence Score (WIS)
- 1
Mu — Ce S2-*01990Bhcwris
Spring4,291 GPM76WIS - 2
Dm Ir St — Cl S1-300248Cl
Spring22,442 GPM76WIS - 3
Re — Ce S2-00063Cwris
Spring1,795 GPM76WIS - 4
Dm — Pe S2-29875
Spring1,050 GPM76WIS - 5
Po — Ap S2-30502
Spring112,208 GPM76WIS - 6
Ci Mu Po — Cc S2-Cv1P75
Spring13,465 GPM76WIS - 7
Fs — Ce S1-*19055Cwris
Spring13,465 GPM76WIS - 8
Fs — Ce S2-*22190Cwris
Spring6,733 GPM76WIS - 9
Ci — Ce S2-28039
Spring1,795 GPM76WIS - 10
Dg Ir St — Cl S2-301490Cl
Spring4,488 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.