Bexar County, Texas
DataCentersExposed tracks 26 AI data centers in Bexar County, Texas — 4 operating and 4 in the pipeline, drawing 632 MW of reported power demand, led by Microsoft Corporation. Its transparent data-center risk score is 0/100.
Sources: Methodology, Coverage scorecard
Reporting by Eric Keller · Updated May 29, 2026
- Project exposure · 38
- Power demand · 55
- Water draw · n/a
- Land footprint · n/a
What's happening in Bexar County
Facilities here with disclosed capacity draw 632 MW from the local grid. Data-center load on this scale is the single biggest driver of recent capacity-market price increases — costs that flow through to every ratepayer in the service territory, not just the operators.
Microsoft Corporation has the largest presence in Bexar County. We resolve project codenames and shell LLCs back to the corporate parent wherever the public record allows, so the table below names who is actually behind each site.
Below: every tracked facility in the county, the active state legislation that names it or its county, and local news. Commissioner vote records arrive in a later release; the placeholders show where that accountability data will land.
2035 Buildout Outlook
Under the model's moderate-growth scenario (5%/yr annual load growth), PNNL's IM3 model sites about 11 standardized 36 MW campuses in Bexar County by 2035 — roughly 396 MW of new electricity demand and ~383 M gal/yr of cooling water. Under the higher-growth scenario (15%/yr) that climbs to 66 campuses (2.4 GW). For scale, we currently track 26 real data centers in Bexar County (632 MW of reported power).
- Low growth7252 MW · ~244 M gal/yr cooling water
- Moderate growth11396 MW · ~383 M gal/yr cooling water
- High growth371.3 GW · ~1.3 billion gal/yr cooling water
- Higher growth662.4 GW · ~2.3 billion gal/yr cooling water
The model assigns ~100% of these campuses' cooling to evaporative water cooling in Bexar County (the rest to mechanical/air cooling), a split it derives from local water stress and wet-bulb temperature.
These are modeled candidate sites, not announced or permitted facilities. PNNL's IM3 model places identical 36 MW unit-campuses at feasible locations under each scenario — it shows where demand could concentrate, never a specific parcel. Figures use a market-gravity weight of 50. How the model works.
Every tracked facility
| Facility | Operator | Status | MW |
|---|---|---|---|
| Black Mountain Power Data Center Van Ormy/ San Antonio | Black Mountain Power | Proposed | — |
| Stream San Antonio Campus San Antonio | Stream Data Centers | Under construction | 200 |
| AWS Rockfish 1 San Antonio | — | Under construction | — |
| AWS Rockfish 3 San Antonio | — | Under construction | — |
| Microsoft San Antonio (Quarry) San Antonio | Microsoft Corporation | Mapped (unverified) | 380 |
| CyrusOne SAT10 & SAT11 | CyrusOne LLC | Mapped (unverified) | 32 |
| Stream San Antonio II | Stream Data Centers | 10.8 | |
| CyrusOne San Antonio I San Antonio | CyrusOne LLC | 9 | |
| Amazon | Amazon.com, Inc. | Mapped (unverified) | — |
| Amazon AWS SAT - 12807 Donop | Amazon.com, Inc. | Mapped (unverified) | — |
| CHRISTUS Health | — | Mapped (unverified) | — |
| Citicorp Data Systems San Antonio | — | — | |
| CyrusOne San Antonio III | CyrusOne LLC | Mapped (unverified) | — |
| Frost Bank | — | Mapped (unverified) | — |
| Gvtc | — | Mapped (unverified) | — |
| H5 Data Centers San Antonio San Antonio | Prime Data Centers | — | |
| Heb San Antonio | — | Mapped (unverified) | — |
| Lowe's Data Center | Prime Data Centers | Mapped (unverified) | — |
| Lumen San Antonio 2 | Lumen Technologies, Inc. | Mapped (unverified) | — |
| Microsoft | Microsoft Corporation | Mapped (unverified) | — |
| Microsoft San Antonio | Microsoft Corporation | Mapped (unverified) | — |
| Microsoft San Antonio San Antonio | Microsoft Corporation | Mapped (unverified) | — |
| QTS San Antonio II San Antonio | QTS Realty Trust, LLC | Mapped (unverified) | — |
| Texas Cryptologic Center | — | Mapped (unverified) | — |
| Valero Wiserman | — | Mapped (unverified) | — |
| Vantage Data Centers TX22 San Antonio | Vantage Data Centers Holdings, LLC | Mapped (unverified) | — |
County commissioners
How the Bexar County board votes on each data-center matter — the rezonings, the abatements, the water permits — is built from public-meeting minutes and roll-call records. Know of a vote we should be tracking? Tell us.