Microsoft Castroville Data Center (SAT 89-90)
Castroville, Medina County, TX
Source: Primary source
Microsoft Castroville Data Center (SAT 89-90) is a proposed data center in Medina County, TX, operated by Microsoft Corporation. DataCentersExposed has documented a 489,400 sq ft footprint at this site.
Reporting by Eric Keller · Updated Jun 18, 2026
Overview
source: linkImported from the FracTracker Alliance U.S. Data Centers Tracker after review. Details to be corroborated from primary sources.
Operator chain
- Ultimate parentMicrosoft Corporation
- Files asMicrosoft Corporation
- This facilityMicrosoft Castroville Data Center (SAT 89-90)
Grid & water — why here
source: HIFLD · EPAThe closest existing grid infrastructure and the municipal water system this location sits in — the same constraints the buildout model screens on (it won't site a campus more than ~2 km from a substation or ~5 km from municipal water). Distances are straight-line to public HIFLD/EPA features, not a metered connection.
In the news
source: Google News- Done right, data centers can help keep San Antonio’s power bills in checkSan Antonio Report· May 9, 2026
- Texas is giving data centers more than $1B in tax breaks each yearSan Antonio Report· Apr 12, 2026
- Construction jobs are San Antonio and they’re building our futureSan Antonio Report· Mar 3, 2026
- Microsoft Building $400M Data Center Near SAConnect CRE· Jan 19, 2026
- Microsoft plans $400m data center in Castroville, TexasData Center Dynamics· Jan 12, 2026
- Microsoft Plans $400M Data Center In Fast-Growing San Antonio HubBisnow· Jan 12, 2026
Tax breaks & subsidies
source: Good Jobs First / GASB 77These tax breaks are recorded to Microsoft Corporation (the operator/parent) and may cover this or other sites — no state names the recipient at the facility level.
- Texas Qualifying Large Data Center Project ExemptionTax break$0State of Texas · granted 2024 · term — yr · source
- Texas Qualifying Large Data Center Project ExemptionTax break$0State of Texas · granted 2023 · term — yr · source
- Texas Qualifying Large Data Center Project ExemptionTax break$0State of Texas · granted 2022 · term — yr · source
- Texas Qualifying Data Center ExemptionTax break$0State of Texas · granted 2021 · term — yr · source
- Texas Qualifying Large Data Center Project ExemptionTax break$0State of Texas · granted 2015 · term — yr · source
- Texas Qualifying Data Center ExemptionTax break$0State of Texas · granted 2013 · term — yr · source
- Texas Qualifying Data Center ExemptionTax break$0State of Texas · granted 2013 · term — yr · source
Texas reported $16.1M in Property used in certain large data center projects; temporary exemption (Texas Tax Code § 151.3595) for FY2025 (Texas Comptroller of Public Accounts). Program-wide, not attributable to this site.
Water use
No public record of this facility's water use. We check state withdrawal reporting for self-supplied sites; municipally supplied sites only become visible through a public-records request to the local water utility — a per-facility request tool is coming. If you have a utility document for this site, send it to us.
EPA permits & violations
source: EPA ECHONo reported violations as of last sync.
Nearest school
source: HIFLD / NCESThe nearest public school, Castroville El in Castroville, is 3.6 mi from this site (644 students).
Schools are sensitive receptors for the noise, backup-generator exhaust, and traffic a large data center brings. Straight-line distance to the nearest public school (HIFLD/NCES, US public schools only).
Hearings timeline
No public-hearing records linked to this site yet. We surface planning-commission and board-of-supervisors dates when a record names a facility. If you know of a hearing on this site, tell us.