Who owns CyrusOne Sterling IX?

CyrusOne Sterling IX is owned and operated by CyrusOne LLC.

Has CyrusOne Sterling IX had environmental violations?

DataCentersExposed tracks 1 EPA enforcement record linked to CyrusOne Sterling IX.

Where is CyrusOne Sterling IX located?

CyrusOne Sterling IX is in Loudoun County, VA.

Operatingcolocation

CyrusOne Sterling IX

Q: What do data center tax breaks cost in Virginia?

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). That is a statewide program figure, not attributable to one site.

Loudoun County, VA

Source: OpenStreetMap

CyrusOne Sterling IX is an operating data center in Loudoun County, VA, operated by CyrusOne LLC. DataCentersExposed has documented a 266,078 sq ft footprint and 1 tracked EPA enforcement record at this site.

Reporting by Eric Keller · Updated Jun 14, 2026

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Est. capacity

~50-110 MW

Footprint

266,078 sq ft

Interconnection

~175 MW

Utility

Northern Virginia Elec Coop

Grid

PJM

Attribution & capacity confidence:mediumprimary source

Status · click to filter

Most sites are mapped — located but awaiting a second source. How we verify

Dot size = disclosed capacity (MW). Smallest = undisclosed, not small.

Overview

source: link

CyrusOne 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 parent
CyrusOne LLC
Files as
CyrusOne LLC
This facility
CyrusOne Sterling IX

In the news

source: Google News

Tax breaks & subsidies

source: Good Jobs First / GASB 77

These tax breaks are recorded to CyrusOne LLC (the operator/parent) and may cover this or other sites — no state names the recipient at the facility level.

Dollar value not disclosed for these records.

Texas Qualifying Large Data Center Project Exemption$0
State of Texas · granted 2022 · term — yr · source
Texas Qualifying Data Center Exemption$0
State of Texas · granted 2017 · term — yr · source
Texas Qualifying Data Center Exemption$0
State of Texas · granted 2016 · term — yr · source

Statewide cost of this incentive

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.

source · All Virginia subsidies →

Water use

Modeled estimate~3.3M gpd

Direct (onsite cooling)

~1.6M gpd

Indirect (its electricity)

~1.7M gpd

No measured record exists, so this is a low-confidence model from 175 MW (interconnection capacity): 1.8 L/kWh cooling (temperate climate) + 0.5 gal/kWh embedded in PJM grid mix. How we estimate. Have a utility document? Send it and we'll replace this with the real figure.

EPA permits & violations

source: EPA ECHO

Clean Air Actno penalty
formal · reported 2024-03-25

Environmental permits

source: Permit register

Clean Air Act permitted sourceVA0000005110774173
NAICS 518210; ECHO compliance status: No Violation Identified
VA DEQ air permit (minor NSR)74173
Diesel backup-generator air permit. Program: mNSR. Reg. 74173.

What this site costs the grid

source: PJM RPM auction reports

Dominion (Virginia / NC) · 2027/28 auction

$333 /MW-day

Peaked at $444/MW-day in 2025/26 — 1.65× the rest of PJM

PJM'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 →

This site's capacity-market cost (estimated)

$6.1M to $13.4M/yr

An estimated ~50 to 110 MW of load at the zone's $333/MW-day, annualized — the capacity charge a load this size carries at the current auction price. Estimated from the building footprint at 200 to 400 W/ft² (the typical range for modern data centers). A rough order-of-magnitude figure, not a metered or permitted capacity.

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: AirNow

PM2.5

Moderate

Good

PM10

Good

Air 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 2023

Median household income

$250K

People of color

73%

Below poverty

Tract population

6,997

Demographics 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 / NCES

The 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.