Digital Realty ACC9
21745 Sir Timothy Drive · Loudoun County, VA
Source: OpenStreetMap
Digital Realty ACC9 is an operating data center in Loudoun County, VA, operated by Digital Realty Trust, Inc.. DataCentersExposed has documented 13.9 MW of reported power capacity and a 329,257 sq ft footprint at this site.
Reporting by Eric Keller · Updated Jun 18, 2026
Overview
source: linkDigital Realty ACC9 is an operating colocation data center in Loudoun County, Virginia, run by Digital Realty Trust, Inc. The site spans 329,257 square feet and draws power from Virginia Electric & Power Co within the PJM grid. Digital Realty operates the facility as part of its broader data center portfolio.
Operator chain
- Ultimate parentDigital Realty Trust, Inc.
- Files asDigital Realty Trust, Inc.
- This facilityDigital Realty ACC9
Grid & water — why here
source: HIFLD · EPAThe closest existing grid infrastructure and the municipal water system this location sits in — the same constraints the buildout model screens on (it won't site a campus more than ~2 km from a substation or ~5 km from municipal water). Distances are straight-line to public HIFLD/EPA features, not a metered connection.
In the news
source: Google News- Digital Realty Expands Swiss Campus With 15MW ZUR4 Data CenterTradingView· Aug 28, 2026
- Digital Realty stock trades below consensus as new data center projects advanceAD HOC NEWS· Aug 28, 2026
- Data center labor shortage pushes operators to train, poach and automateFierce Network· Aug 28, 2026
- Digital Realty starts construction of a new data center in Switzerlandw.media· Aug 28, 2026
- Hillsboro Planning Commission hears testimony on proposed data center restrictionsKATU· Aug 27, 2026
- Digital Realty (NYSE: DLR): What Does Today’s Update Say About the AI Buildout?Kalkine Media· Aug 27, 2026
Tax breaks & subsidies
source: Good Jobs First / GASB 77No per-deal tax break is linked to this site yet. No state discloses the recipient of a data-center abatement at the facility level, so per-site deals are rare in the public record. If you have a development agreement or board resolution for this site, send it to us.
Virginia reported $1B in Data Center Retail Sales and Use Tax Exemption (Va. Code § 58.1-609.3(18)) for FY2024 (Virginia Joint Legislative Audit and Review Commission (JLARC) / Weldon Cooper Center). Program-wide, not attributable to this site.
Water use
No public record of this facility's water use. We check state withdrawal reporting for self-supplied sites; municipally supplied sites only become visible through a public-records request to the local water utility — a per-facility request tool is coming. If you have a utility document for this site, send it to us.
EPA permits & violations
source: EPA ECHONo reported violations as of last sync.
What this site costs the grid
source: PJM RPM auction reportsPJM's capacity auction sets a $/MW-day price that utilities pass on to every household and business in the zone. This site sits in PJM's DOM pricing zone, where soaring data-center demand is a documented driver. See the full zone-by-zone breakdown →
13.9 MW of load at the zone's $333/MW-day, annualized — the capacity charge a load this size carries at the current auction price.
Separately, a typical home in this zone pays an estimated $4 to $10/mo more on the capacity portion of its bill that PJM's market monitor attributes to data-center demand. See your address's full impact →
Air quality near this site
source: AirNowAir Quality Index from the nearest AirNow reporting area (Northern Virginia), as of 2026-06-10. Regional context — not this facility's own emissions.
Who lives nearby
source: Census ACS 2023Demographics of the census tract this facility sits in (American Community Survey 5-year estimates). Environmental-justice context for who bears the local impacts.
Nearest school
source: HIFLD / NCESThe nearest public school, Discovery Elementary in Ashburn, is 0.6 mi from this site (710 students).
Schools are sensitive receptors for the noise, backup-generator exhaust, and traffic a large data center brings. Straight-line distance to the nearest public school (HIFLD/NCES, US public schools only).
Hearings timeline
No public-hearing records linked to this site yet. We surface planning-commission and board-of-supervisors dates when a record names a facility. If you know of a hearing on this site, tell us.