CyrusOne Cincinnati-Mason CIN3
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 30 MW of reported power capacity and a 82,813 sq ft footprint at this site.
Reporting by Eric Keller · Updated Jun 18, 2026
Overview
source: linkCyrusOne 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 parentCyrusOne LLC
- Files asCyrusOne LLC
- This facilityCyrusOne Cincinnati-Mason CIN3
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- ShinyHunters hackers claim to have hit data center provider used by Microsoft and MetaTechRadar· Aug 26, 2026
- Yomiuri: KEPCO, CyrusOne to Build Hyperscale Data Center in Osaka Prefecture with Completion Planned in 2029MarketWatch· Aug 26, 2026
- Data centers in danger? Attackers blackmail Cyrus, as infrastructure data may have been stolenCybernews· Aug 25, 2026
- Top 10: Data Centre Companies in the UKData Centre Magazine· Aug 19, 2026
- How One Data Center Company Plans to Earn Texans' TrustGovTech· Aug 17, 2026
- Vantage, CyrusOne, and DayOne all plan IPOs with potential record breaking valuationsData Center Dynamics· Aug 13, 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.
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.
Water use
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 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 cleared at the PJM-wide (RTO) price, where soaring data-center demand is a documented driver. See the full zone-by-zone breakdown →
30 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 (Cincinnati), 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, 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.