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.

Will County

County in IL · 1 data centres recorded in OpenStreetMap

Mapped facilities
1
on the map today
Floor area
0.00
km² across 0 buildings
Share of US load
0
MW, inferred upper bound
Water
0.00
million gal/day, inferred
1 of these 1 are not mapped as buildings, so no power figure is estimated for them. 1 is a campus boundary covering 3.23 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 represents.

When these appeared on the map

observed, not surveyed

Not enough history to draw a series.

What the grid here looks like

reported by OSM contributors
Substations
54
69 kV and above
Bulk substations
21
230 kV and above
Highest voltage
765
kV, present in this county
Generating capacity
7,446
MW across 24 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. 5 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
Joliet Technology Centernot recordedCampus boundary3,225,950—2026-06-11

“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.