San Antonio Water Intelligence
Texas · 1,434,625 residentsSan Antonio was historically the largest US city solely dependent on groundwater (Edwards Aquifer) and is actively diversifying.
100% reliant on Edwards Aquifer for decades
200
Assets Mapped
65.6
Avg WIS
4
Asset Types
60km
Radius
About Water Supply in San Antonio
San Antonio was historically the largest US city solely dependent on groundwater (Edwards Aquifer) and is actively diversifying.
Hi3 Water tracks 200 water assets within 60km of San Antonio, including springs, wells, aquifers, and water rights transactions. The average Water Intelligence Score in this area is 65.6/100. The most common asset type is River (131 assets).
Data sources: USGS, EPA, state water boards. Report last updated: June 30, 2026.
Water Assets Near San Antonio
Top Water Assets Near San Antonio
Ranked by Water Intelligence Score (WIS)
- 1
Carrizo-Wilcox Fossil Aquifer — South Texas
Fossil Water500 GPM80WIS - 2
Edwards Aquifer Deep Fossil Zone — San Antonio
Fossil Water1,500 GPM79WIS - 3
Edwards Aquifer — Balcones Fault Zone
Aquifer10,000 GPM79WIS - 4
Medina Lake Dam
Reservoir50,000,000 GPM67WIS - 5
Canyon Lake Dam - Dike A
Reservoir50,000,000 GPM67WIS - 6
Canyon Lake Dam
Reservoir50,000,000 GPM67WIS - 7
Salado Creek Ws Scs Site 12 Dam
Reservoir19,239,141 GPM66WIS - 8
Calaveras Creek Dam
Reservoir50,000,000 GPM66WIS - 9
Salado Creek Ws Scs Site 13A Dam
Reservoir13,510,711 GPM66WIS - 10
Olmos Dam
Reservoir33,359,813 GPM66WIS
Explore San Antonio on the Interactive Map
View all water assets within 60km of San Antonio, including aquifer boundaries, water rights, drought status, and regulatory alerts.