Digital Realty - Ashburn Campus

Loudoun County, VA

OperatorDigital Realty
Permits3
Generators permitted28
Latest permitAugust 23, 2017

What the disclosures say.

Each layer below carries its own confidence tier and its own citation. There is deliberately no blended risk score: a single number would hide which parts are read from a filing and which are inferred.

Air permitconfirmed
3 issued permits

Latest issued August 23, 2017. Article 6 — minor new source review. Issued by Northern.

VA DEQ — Issued Air Permits for Data Centers, published as of August 17, 2026
Flood zoneconfirmed
Zone X — area of minimal flood hazard

Outside a Special Flood Hazard Area. Point-in-polygon lookup against the effective FEMA map.

Water stressconfirmed
Low (<10%)

Baseline water stress — the share of available surface water withdrawn each year in this basin. Overall water risk: Low (0-1).

WRI Aqueduct 4.0 baseline annual water risk
Grid interconnectionpending
Not yet matched

PJM Data Miner 2 API key not configured (set PJM_API_KEY). PJM retired the public bulk queue download, so no interconnection match is asserted for this site.

No citation — PJM retired its public bulk queue download; this layer awaits a Data Miner feed.
Locationprobable
21744 Sir Timothy Drive, Loudoun County, VA

Recovered from the text of permit 73370-16, adjacent to the facility/equipment description. Not a structured field in the DEQ listing.

Permit 73370-16 · permit PDF
Operatorconfirmed
Digital Realty

Permit is held in the name of Digital Realty.

Permittee of record: Digital Realty - Ashburn Campus
Permitted equipmentprobable
28 generators

Counted from the permit text. Permits describe equipment in prose and tables; treat as the permitted maximum described, not an installed count.

Read from the text of 3 permit documents listed below

Geocoded to 39.01268, -77.46540 via osm-nominatim, county cross-checked against the permit.

Where this site sits in the build.

Proposed
Filed
Approved
Under construction
Operational

Air permit issued 2017-08-23. Construction and operational status are not established by permit data alone. confirmed

What the operator says

No public operator statements have been recorded for this site. Company claims about capacity, cooling technology and water use are kept in this block, separate from the verified record above, and are never merged into it.

Every dated event on the record.

  • August 27, 2013

    Air permit 73370-12 issued

    Article 6 — minor new source review · source confirmed

  • December 7, 2016

    Air permit 73370-15 issued

    Article 6 — minor new source review · source confirmed

  • August 23, 2017

    Air permit 73370-16 issued

    Article 6 — minor new source review · source confirmed

Every permit behind this record.

RegistrationIssuedProgramDocument
73370-16August 23, 2017Article 6 — minor new source reviewPermit PDF
73370-15December 7, 2016Article 6 — minor new source reviewPermit PDF
73370-12August 27, 2013Article 6 — minor new source reviewPermit PDF

Spotted an error?

Fuzzy-matched fields are labelled as such and some will be wrong. Open an issue — corrections are tracked in public and noted on the page.