Equinix DC-21 and DC-22 (Ashburn East), Ashburn
approved CampusOperated by Equinix, LLC
Virginia DEQ issued Equinix, LLC an air permit document (Registration No. 74189) on October 17, 2025 for diesel engine gen-sets at the DC-21 and DC-22 data centers on Beaumeade Circle in Ashburn, superseding the permit document dated December 18, 2024. The permit authorizes construction of three additional Cummins QSK95-G15 emergency diesel gen-sets rated 3,350 kWe each, alongside previously permitted emergency and non-emergency units dating to 2021 and 2023.
Land use jurisdiction: Loudoun County
Measurements on record
No disclosed measurements on record yet.
Permitting path
Approvals on record for 2 of 11 path steps; latest: DEQ air permit (generators) (2025-10-17).
Virginia's sequence runs through county land-use case records to DEQ air permits; rezonings and special use permits are the public record spine, and DEQ publishes the data-center air permit register.
| Date | Step | Authority | Instrument | Status |
|---|---|---|---|---|
| 2025-10-17 | DEQ air permit (generators) | Virginia Department of Environmental Quality | Article 6 minor NSR permit (superseding), Registration No. 74189
Article 6 minor NSR permit (superseding), Registration No. 74189 (original) |
on record |
| Site control (deed or lease) | Owner of record (county parcel roll)
061205971000 |
on record | ||
| Special use permit / site plan | Loudoun County | not yet requested | ||
| Rezoning applies where the site's zoning does not already allow the use |
Loudoun County | not yet requested | ||
| Natural gas service applies where the facility uses natural gas |
not yet requested | |||
| Utility interconnection (PJM queue) | not yet requested | |||
| Sewer service commitment | not yet requested | |||
| Water service commitment | not yet requested | |||
| Building permit | Loudoun County | not yet requested | ||
| Stormwater (VSMP permit) applies where land disturbance passes permit thresholds |
Virginia Department of Environmental Quality | not yet requested | ||
| Public agreements and incentives applies where negotiated with the host jurisdiction |
Loudoun County | not yet requested | ||
| Go-live | not yet live |
Steps without a record are shown as not yet requested or not on record: absence of a record here is a records gap, not a finding about the facility. An authority shown for an empty step is the body that would issue it. Some authorities are shown before any record exists, from mapped utility service areas or, for sewer service, from municipal limits; these carry a marker naming the basis.
Site parcels
Control documented for 1 of 1 identified parcels.
| Parcel | Owner of record | Control | Evidence |
|---|---|---|---|
| 061205971000 | EQUINIX LLC (as of 2026-07-24) | Owned | Owner of record (county parcel roll) source |
Ownership is shown as the public record states it. A parcel without control evidence here is a records gap: a lease is a private instrument whose public trace usually first appears in an application file.
About this path and the law behind each step: the law on record for this jurisdiction
Location and sources
Ashburn, Loudoun County, Virginia
Every record links to its source: public records, press reporting, and openly licensed datasets including Epoch AI, Wikidata, and US EPA. Full sourcing and per-source licensing: methodology · sources.