Bexar County

County in TX · 67 data centres recorded in OpenStreetMap

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Mapped facilities

on the map today

Floor area

0.47

km² across 57 buildings

Share of US load

518

MW, inferred upper bound

Water

1.13

million gal/day, inferred

10 of these 67 are not mapped as buildings, so no power figure is estimated for them. 10 are campus boundaries covering 1.50 km² of land. The megawatt figure above divides a national total by building floor area, and the area of a land parcel is not floor area. A site still being built consumed none of the electricity that total measures. Both are counted here and left out of the estimate rather than folded into it, so this region's load is understated by however much those represent.

When these appeared on the map

observed, not surveyed

Data centres recorded in OpenStreetMap at the end of each month. The hatched stretch is before 2017-01, when telecom=data_center was not yet in common use — the near-zero readings there describe the tag, not the country. This is a count of what has been mapped, and OpenStreetMap carries no construction dates.

31 of these 67 facilities do not appear in the curve. The chart counts facilities whose appearance was observed in OpenStreetMap's edit history; one mapped before 2012 has no creation edit to observe. The two numbers answer different questions — how many are on the map now, and how many were watched arriving — and neither is wrong.

What the grid here looks like

reported by OSM contributors

Substations

103

69 kV and above

Bulk substations

230 kV and above

Highest voltage

345

kV, present in this county

Generating capacity

4,479

MW across 25 plants

A facility drawing hundreds of megawatts connects at bulk transmission voltage, so the second figure matters more than the first: forty 69 kV yards are not a substitute for one 500 kV substation. 7 of the plants here carry no capacity tag, so the megawatt total is a floor rather than the region's output.

Proximity is not connection. Nothing here shows that any facility has contracted power from any of these substations. That gets settled in interconnection filings Helios cannot read, and in several regions those queues now run for years. A county showing no substations may have none mapped rather than none standing.

Largest named mapped records

by mapped area

Name	Operator	Mapped as	Mapped area m²	Share MW	First mapped
Microsoft Texas Research Park Campus	Microsoft	Campus boundary	672,739	—	2017-09-04
Vantage San Antonio I	Vantage Data Centers	Campus boundary	152,848	—	before 2012
Microsoft SAT14	not recorded	Campus boundary	145,845	—	before 2012
Vantage San Antonio II	not recorded	Campus boundary	112,871	—	before 2012
QTS San Antonio	not recorded	Campus boundary	96,865	—	before 2012
CyrusOne SAT10 & SAT11	CyrusOne	Campus boundary	86,908	—	2024-12-20
Microsoft San Antonio	Microsoft	Building	44,467	48.7	2017-07-23
Texas Cryptologic Center	National Security Agency	Campus boundary	41,369	—	2017-07-23
Microsoft	Microsoft	Building	23,987	26.3	2017-07-23
Microsoft	Microsoft	Building	22,880	25.1	2026-04-23
Microsoft	Microsoft	Building	21,264	23.3	2021-12-08
Microsoft	Microsoft	Building	21,264	23.3	2021-12-08
Microsoft	Microsoft	Building	18,108	19.9	2017-07-23
Microsoft TRP1	Microsoft	Building	16,487	18.1	2019-03-03
Microsoft TRP2	Microsoft	Building	15,773	17.3	2019-03-03
Microsoft	Microsoft	Building	14,078	15.4	before 2012
QTS San Antonio II	Quality Technology Services	Building	13,036	14.3	2022-07-28
Vantage TX11	Vantage Data Centers	Building	11,417	12.5	before 2012
Vantage TX12	Vantage Data Centers	Building	11,417	12.5	before 2012
Vantage TX12	Vantage Data Centers	Building	11,417	12.5	before 2012
Vantage Data Centers TX21	Vantage Data Centers	Building	10,523	11.5	before 2012
Vantage Data Centers TX22	Vantage Data Centers	Building	10,522	11.5	2026-04-23
Amazon AWS SAT - 12807 Donop	Amazon Web Services	Building	10,256	11.2	2025-12-23
CyrusOne San Antonio II	CyrusOne	Building	10,085	11.1	2017-07-23
Amazon	not recorded	Building	9,746	10.7	2024-12-20
CyrusOne San Antonio I	CyrusOne	Building	9,506	10.4	2017-07-23
CyrusOne San Antonio III	CyrusOne	Building	9,340	10.2	2017-07-23
Lowe's Data Center	Lowe's	Building	8,758	9.6	2017-07-23
CyrusOne San Antonio IV	not recorded	Building	8,598	9.4	2024-12-20
Stream San Antonio II	not recorded	Building	6,626	7.3	2017-07-23
Valero Wiserman	Valero	Building	5,417	5.9	2017-07-23
H5 Data Centers San Antonio	H5 Data Centers	Building	1,942	2.1	2025-12-23
Lumen San Antonio 2	Lumen Technologies	Building	1,182	1.3	2025-12-23
GVTC	GVTC	Building	41	0.1	2024-06-27

“First mapped” is when OpenStreetMap recorded the facility, not when it was built — OpenStreetMap carries no construction dates. Mapped area means a building floor plate, campus boundary, or construction polygon according to the “Mapped as” column; those quantities are never added together. The megawatt column appears only for buildings and is their floor-area share of a reported national total, not a measurement.