HELIOSOpen AI Infrastructure Observatory
Static snapshot. This site serves two different things: 1,853 data centres reported by OpenStreetMap contributors nationwide, and 13 sites Helios infers from Arizona parcel records, exported on July 29, 2026. The first is a map of what has been recorded; the second is an argued hypothesis with an evidence chain. This is a point-in-time export, not a live view. See meta.json or the methodology.

Clark County

County in NV · 23 data centres recorded in OpenStreetMap

Mapped facilities
23
on the map today
Floor area
0.25
km² across 19 buildings
Share of US load
279
MW, inferred upper bound
Water
0.61
million gal/day, inferred
3 of these 23 are not mapped as buildings, so no power figure is estimated for them. 2 are campus boundaries covering 0.19 km² of land, and 1 is a site mapped as under construction. 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
01223201920202021202220232024202420252025
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.

What the grid here looks like

reported by OSM contributors
Substations
228
69 kV and above
Bulk substations
66
230 kV and above
Highest voltage
500
kV, present in this county
Generating capacity
14,883
MW across 96 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. 38 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
NameOperatorMapped asMapped area m²Share MWFirst mapped
Google Henderson Data CenterGoogleCampus boundary189,325—2025-04-15
Switch Las Vegas 12not recordedUnder construction44,969—2024-09-09
Switch12SwitchBuilding35,16738.52024-09-09
Switch Las Vegas 7SwitchBuilding30,16733.12021-09-19
Switch Las Vegas 9SwitchBuilding26,58729.12021-09-19
Switch Las Vegas 8SwitchBuilding24,56526.92021-09-19
Switch Las Vegas 11SwitchBuilding21,39223.42021-09-19
Switch Las Vegas 14SwitchBuilding20,81022.82025-08-09
Switch Las Vegas 10not recordedBuilding19,17621.02021-09-19
GoogleGoogleBuilding13,36614.72020-09-04
GoogleGoogleBuilding13,12014.42020-09-04
Flexential Las Vegas - NorthFlexentialBuilding10,28711.32019-11-17
DataBank Las Vegas LAS1DataBankBuilding5,4396.02022-02-23
CenturyLinkLumen TechnologiesCampus boundary4,572—2022-01-01
Switch Las Vegas 4SwitchBuilding2,5812.82024-02-02
Switch Edge 1not recordedBuilding2,5712.82024-09-09
Verizonnot recordedBuilding2,4052.62024-02-02
Verizon North Las VegasVerizonBuilding2,3322.62025-10-18
Switch Las Vegas 5SwitchBuilding1,3961.52024-02-02
CenturyLinknot recordedBuilding1,0781.22021-12-18
Flexential Las Vegas - DowntownFlexentialBuilding410.02025-04-21
Fiberhub LAS1FiberhubPoint——2025-11-17

“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.