Data centers and water
Data Center Water Use in Bexar County, TX
Bexar County, Texas has 42 mapped data center facilities, including AWS, Microsoft, carrying about 1.04 GW of estimated power load.
Water pressure for new demandHow hard a large new water user, like a data center, would press on this county's water. It blends recent drinking-water compliance, drought, and existing industrial demand. Higher pressure means new demand competes harder with current uses. It is not a judgment about whether one should be built.
Moderate water pressure
Bexar County has no health violations in the last 5 years, extreme drought, low existing industrial water demand.
- Mapped facilities
- 42
- EPA + OpenStreetMap layers
- Estimated power load
- 1.04 GW
- IM3 Atlas capacity estimate
- Permitted discharge
- Not reported
- Clean Water Act permit fields
- DCWSI national rank
- #32
- of 318 scored counties
The operators
How many data centers are in Bexar County?
42 facilities are mapped to Bexar County, Texas across the EPA and OpenStreetMap layers, run by operators including AWS, Microsoft. Counts reflect mapped footprint, not an operator's total fleet.
- OpenStreetMap
Amazon
AWS · 48
- OpenStreetMap
Amazon AWS SAT - 12807 Donop
AWS · 48
- OpenStreetMap
CyrusOne San Antonio I
CyrusOne · San Antonio, TX
- OpenStreetMap
CyrusOne San Antonio II
CyrusOne · 48
- OpenStreetMap
CyrusOne San Antonio III
CyrusOne · 48
- OpenStreetMap
CyrusOne San Antonio IV
CyrusOne · 48
- OpenStreetMap
CyrusOne SAT10 & SAT11
CyrusOne · 48
- OpenStreetMap
GVTC
GVTC · 48
- OpenStreetMap
H5 Data Centers San Antonio
H5 Data Centers · San Antonio, TX
- OpenStreetMap
Lowe's Data Center
Lowe's · 48
- OpenStreetMap
Lumen San Antonio 2
Lumen Technologies · 48
- OpenStreetMap
Microsoft
Microsoft · San Antonio, TX
- OpenStreetMap
Microsoft
Microsoft · San Antonio, TX
- OpenStreetMap
Microsoft
Microsoft · 48
- OpenStreetMap
Microsoft
Microsoft · 48
- EPA ECHO
MICROSOFT
Microsoft · SAN ANTONIO, TX
- OpenStreetMap
Microsoft San Antonio
Microsoft · San Antonio, TX
- OpenStreetMap
Microsoft TRP1
Microsoft · 48
24 more mapped facilities counted in this county's score.
Supply versus demand
How much water do Bexar County data centers use?
Exact facility water draw is rarely public. As a screening proxy we compare the Clean Water Act permitted discharge mapped to these facilities against the county's entire industrial water baseline from the USGS 2020 series.
No Clean Water Act permitted discharge is reported for the mapped facilities in Bexar County. The figures below show the county's industrial water baseline for context.
- Mapped facility discharge
- Not reported
- County industrial baseline
- 7.44 Mgal/day
Model a build
Can Bexar County support more data centers?
Bexar County carries 34 on the water-pressure scale, so new large-load demand warrants closer scrutiny. Size a hypothetical build to see the daily draw against the county industrial baseline.
Data Center Water Budget Calculator
Estimate daily water use for a hypothetical facility in Bexar County.
Your facility would use 10.7% of this county's industrial water baseline — manageable but worth monitoring against drought trends.
Based on USGS 2020 water-use data and EPA-standard cooling intensity constants. Not a substitute for site-specific water rights analysis.
In context
How does Bexar County compare nationally?
- DCWSI build-out rank
- #32
- of 318 counties with a stress score
- Water pressure vs median
- +15
- national median is 19 of 100
- Share of mapped load
- 0.6%
- of 166.02 GW mapped nationally
Bexar County is one of 330 US counties with mapped data centers. See the full ranking and the interactive map in the national atlas.
Facility data combines EPA ECHO, EPA Clean Water Act permits, OpenStreetMap, and the IM3 Open Source Data Center Atlas (DOE/PNNL), geocoded to county FIPS. Capacity and water baselines come from IM3 and USGS 2020 water-use data. These are county-level screening figures, not a facility-level water-use audit. Read the full methodology.