San Francisco Water Intelligence
California · 873,965 residentsSan Francisco draws most of its water from the Hetch Hetchy Reservoir in Yosemite National Park via gravity-fed pipelines.
Hetch Hetchy system from Yosemite
200
Assets Mapped
64.8
Avg WIS
3
Asset Types
60km
Radius
About Water Supply in San Francisco
San Francisco draws most of its water from the Hetch Hetchy Reservoir in Yosemite National Park via gravity-fed pipelines.
Hi3 Water tracks 200 water assets within 60km of San Francisco, including springs, wells, aquifers, and water rights transactions. The average Water Intelligence Score in this area is 64.8/100. The most common asset type is River (182 assets).
Data sources: USGS, EPA, state water boards. Report last updated: July 31, 2026.
Water Assets Near San Francisco
Top Water Assets Near San Francisco
Ranked by Water Intelligence Score (WIS)
- 1
Stevens Creek
Reservoir7,942,962 GPM67WIS - 2
Pilarcitos
Reservoir558,525 GPM67WIS - 3
Del Valle
Reservoir21,095,057 GPM67WIS - 4
Martinez Dam
Reservoir23,788 GPM66WIS - 5
Bear Gulch
Reservoir31,373 GPM66WIS - 6
Lake Orinda
Reservoir212,791 GPM66WIS - 7
Lake Madigan
Reservoir1,647,210 GPM66WIS - 8
Lake Frey
Reservoir458,256 GPM66WIS - 9
Sycamore Creek
River1,283 GPM65WIS - 10
Las Trampas Creek
River1,663 GPM65WIS
Explore San Francisco on the Interactive Map
View all water assets within 60km of San Francisco, including aquifer boundaries, water rights, drought status, and regulatory alerts.