Amazon Data Services IAD-500 and IAD-501, Herndon
approved CampusOperated by Amazon Data Services, Inc.
Virginia DEQ issued Amazon Data Services, Inc. an air permit (Registration No. 74300) on March 12, 2025 to construct and operate diesel generator sets at the IAD-500 and IAD-501 data center campus in Herndon, Fairfax County. The equipment list covers 70 MTU 20V4000 DS2800 non-emergency gen-sets rated 2,750 ekW each with selective catalytic reduction and catalyzed diesel particulate filters, 2 MTU 16V2000 units at 1,000 ekW, and 2 Caterpillar 3516C units at 2,000 ekW.
Land use jurisdiction: Town of Herndon
Measurements on record
Permitting path
Approvals on record for 1 of 11 path steps; latest: DEQ air permit (generators) (2025-03-12).
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 |
|---|---|---|---|---|
| 2025-03-12 | DEQ air permit (generators) | Virginia Department of Environmental Quality | Article 6 minor NSR permit to construct and operate, Registration No. 74300
Article 6 minor NSR permit to construct and operate, Registration No. 74300 (original) |
on record |
| Site control (deed or lease) | not disclosed | |||
| Special use permit / site plan | Town of Herndon | not yet requested | ||
| Rezoning applies where the site's zoning does not already allow the use |
Town of Herndon | 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 | Town of Herndon (sewer service) (municipal limits) | not yet requested | ||
| Water service commitment | not yet requested | |||
| Building permit | Town of Herndon | 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 |
Town of Herndon | 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
Parcels identified; control evidence not on record.
| Parcel | Owner of record | Control | Evidence |
|---|---|---|---|
| 0242 01 0013A | Owner not on record | Not on record | 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
Herndon, Fairfax 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.