Who owns CyrusOne Cincinnati-Mason CIN3?

CyrusOne Cincinnati-Mason CIN3 is owned and operated by CyrusOne LLC.

Has CyrusOne Cincinnati-Mason CIN3 had environmental violations?

As of the latest EPA ECHO sync, no enforcement actions are on record for CyrusOne Cincinnati-Mason CIN3.

Where is CyrusOne Cincinnati-Mason CIN3 located?

CyrusOne Cincinnati-Mason CIN3 is in Warren County, OH.

Operatingcolocation

CyrusOne Cincinnati-Mason CIN3

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

Ohio reported $130.4M in Sales/use tax exemption for qualified property used in an eligible computer data center (R.C. § 122.175) for FY2024 (Ohio Department of Taxation / Office of Budget and Management). That is a statewide program figure, not attributable to one site.

Warren County, OH

Source: OpenStreetMap

CyrusOne Cincinnati-Mason CIN3 is an operating data center in Warren County, OH, operated by CyrusOne LLC. DataCentersExposed has documented a 82,813 sq ft footprint at this site.

Reporting by Eric Keller · Updated Jun 14, 2026

Report a concern at this facility Watch this facility (email alerts)

Est. capacity

~15-35 MW

Footprint

82,813 sq ft

Utility

Duke Energy Ohio INC

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 Cincinnati-Mason CIN3 is an operating colocation data center in Warren County, Ohio, run by CyrusOne LLC. Its reported footprint is 82,813 square feet. The site draws power from Duke Energy Ohio INC inside the PJM grid.

Operator chain

Ultimate parent
CyrusOne LLC
Files as
CyrusOne LLC
This facility
CyrusOne Cincinnati-Mason CIN3

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

Ohio reported $130.4M in Sales/use tax exemption for qualified property used in an eligible computer data center (R.C. § 122.175) for FY2024 (Ohio Department of Taxation / Office of Budget and Management). Program-wide, not attributable to this site.

source · All Ohio subsidies →

Water use

Modeled estimate~93.6K gpd

Direct (onsite cooling)

~45.6K gpd

Indirect (its electricity)

~48K gpd

No measured record exists, so this is a low-confidence model from 5 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

No reported violations as of last sync.

What this site costs the grid

source: PJM RPM auction reports

AEP (Ohio / WV / VA) · 2027/28 auction

$333 /MW-day

PJM's capacity auction sets a $/MW-day price that utilities pass on to every household and business in the zone. This site cleared at the PJM-wide (RTO) price, where soaring data-center demand is a documented driver. See the full zone-by-zone breakdown →

This site's capacity-market cost (estimated)

$1.8M to $4.3M/yr

An estimated ~15 to 35 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 (Cincinnati), as of 2026-06-10. Regional context — not this facility's own emissions.

Who lives nearby

source: Census ACS 2023

Median household income

$143.6K

People of color

28%

Below poverty

11%

Tract population

4,539

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, Symmes Elementary School in Loveland, is 1.5 mi from this site (648 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.