CyrusOne Sterling IX
Loudoun County, VA
Source: OpenStreetMap
CyrusOne Sterling IX is an operating data center in Loudoun County, VA, operated by CyrusOne LLC. DataCentersExposed has documented 135 MW of reported power capacity, a 266,078 sq ft footprint and 1 tracked EPA enforcement record at this site.
Reporting by Eric Keller · Updated Jun 18, 2026
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Loudoun, Virginia
It's built. The levers now are permit renewals, noise/air complaints, and rate-case intervention.
Hearing timeline
- Board of Supervisors Business Meeting
Tue, Jul 21, 2026
Board of Supervisors Business Meeting: data-center item — Board Member Initiative: Operational Regulations on Existing Data Center Backup Generators (Countywide) Staff Contact(s): Christi Maple, Supervisor Saines’ Office
- DecisionBoard of Supervisors Public Hearing
Wed, Jul 15, 2026
Board of Supervisors Public Hearing: LEGI-2025-0012, Golden Substation: CMPT-2025-0005, SPEX-2025-0032, SPEX-2025-0033, & ZMOD-2026-0002 (Sterling) Staff Contact(s): Kristian Maldonado & Daniel Galindo, Planning and Zoning
- DecisionBoard of Supervisors Business Meeting
Tue, Jul 7, 2026
Board of Supervisors Business Meeting: *LEGI-2025-0010, Barrister Substation: SPEX-2025-0021 & SPEX-2025-0023 (Sterling) Staff Contact(s): Allison Britain & Daniel Galindo, Planning and Zoning
- DecisionJoint Board of Supervisors/Planning Commission Special Business Meeting
Tue, Jun 30, 2026
Joint Board of Supervisors/Planning Commission Special Business Meeting: data-center item — Data Center Standards & Locations Ph 2
- DecisionPlanning Commission Public Hearing
Tue, May 26, 2026
Planning Commission Public Hearing: data-center item — Golden Substation permit and special exception applications in Sterling for utility project.
- DecisionBoard of Supervisors Business Meeting
Tue, Apr 21, 2026
Board of Supervisors Business Meeting: data-center item — Zoning amendment for Concorde Industrial Park in Sterling.
Withdrawn — applicant withdrew Concorde Industrial Park item; removed from agenda.
- DecisionBoard of Supervisors Business Meeting and Public Hearing
Tue, Mar 17, 2026
Board of Supervisors Business Meeting and Public Hearing: data-center item — Zoning Map Amendment for Concorde Industrial Park in Sterling; rezoning 17.2 acres.
- DecisionBoard of Supervisors Business Meeting
Wed, Feb 18, 2026
Board of Supervisors Business Meeting: data-center item — Comprehensive Plan Amendment for countywide electrical infrastructure provisions.
- DecisionBoard of Supervisors Public Hearing
Wed, Feb 11, 2026
Board of Supervisors Public Hearing: data-center item — Zoning map amendment and special exceptions for Concorde Industrial Park in Sterling
- DecisionPlanning Commission Public Hearing
Wed, Jan 28, 2026
Planning Commission Public Hearing: data-center item — Concorde Industrial Park zoning map amendment and special exceptions in Sterling.
- DecisionBoard of Supervisors Business Meeting
Wed, Jan 21, 2026
Board of Supervisors Business Meeting: data-center item — Comprehensive Plan Amendment for housekeeping and clean-up text amendments to 2019 General Plan.
- DecisionBoard of Supervisors Public Hearing
Wed, Jan 14, 2026
Board of Supervisors Public Hearing: data-center item — Countywide comprehensive plan amendment regarding electrical infrastructure.
- Board of Supervisors Business Meeting
Tue, Jan 6, 2026
Board of Supervisors Business Meeting: data-center item — Board Member Initiative: Data Center Informational Fact Sheet (Countywide)
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Your action kit
Sourced arguments and ready-to-send letters — every figure links to a primary record. Edit to add your own story.
135 MW of new demand — roughly a city of 108,000 homes.
Large new loads can raise transmission and capacity costs that land on every ratepayer. Residential power in VA is 17.6¢/kWh, up 15.4% year-over-year. (MW→homes is a rough ~800/MW planning figure.)
Source1 recorded violation tied to this operator or site.
A documented compliance history is fair grounds to demand binding conditions and independent monitoring.
SourceDemand a full, public review — not a rubber stamp.
Ask for an independent noise study, a water-and-power impact assessment, enforceable conditions (setbacks, hours, cooling type), and that the record stays open for written comment. Procedural shortcuts have voided approvals elsewhere.
Edit freely before sending — it's a starting point. Add your own story; personal comments carry the most weight.
Edit freely before sending — it's a starting point. Add your own story; personal comments carry the most weight.
Join the campaign
Add your name and we'll email you before every hearing, with what to say and where to show up.
Neighbors taking a stand
Overview
source: linkCyrusOne Sterling IX is an operating colocation data center in Loudoun County, Virginia, run by CyrusOne LLC. The 266,078 square foot site draws power from Northern Virginia Electric Cooperative within the PJM grid. It carries one tracked environmental enforcement record.
Operator chain
- Ultimate parentCyrusOne LLC
- Files asCyrusOne LLC
- This facilityCyrusOne Sterling IX
In the news
source: GDELTIn public meetings
Where this facility is discussed in the verbatim record of public government meetings. Captions are auto-generated and uncorrected.
- Board of Supervisors Public HearingJul 15, 2026
“…d to left tus so they nogo thugh the nehborhood. Thank you. so have come outo this lotion twiceone when we were talki about the black chamr data centerthe daa cter owned bblack chaer, which is the me of thgroup. And then anothetimjust to lok around. U know, t is interting to me which plnning mmissioner voted agast this…” [48:07]
Read the transcript · 2 mentions - Board of Supervisors Business MeetingJul 7, 2026
“…ons programs. Second, loudoun transit has implemented several service changes as of JULY 1st including transit on-demand, pilot program and sterling, seven days a week, and expansion of existing transit service in leesburg. Additionally bus service providing more options for writers to travel directly to washington, D.…” [23:57]
Read the transcript · 4 mentions
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.
EPA permits & violations
source: EPA ECHO- Clean Air Actno penaltyformal · reported 2024-03-25
Environmental permits
source: Permit register- Clean Air Act permitted sourceVA0000005110774173NAICS 518210; ECHO compliance status: No Violation Identified
- VA DEQ air permit (minor NSR)74173Diesel backup-generator air permit. Program: mNSR. Reg. 74173.
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, Stone Hill Middle in Ashburn, is 0.8 mi from this site (1,110 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.