CoreSite BO1
70 Inner Belt Road · Somerville, Middlesex County, MA
Source: OpenStreetMap
CoreSite BO1 is an operating data center in Middlesex County, MA, operated by CoreSite, LLC and ultimately owned by American Tower Corporation. DataCentersExposed has documented a 133,960 sq ft footprint at this site.
Reporting by Eric Keller · Updated Jun 17, 2026
Overview
source: linkdata center
Operator chain
- Ultimate parentAmerican Tower Corporation
- Files asCoreSite, LLC
- This facilityCoreSite BO1
The grid behind this site, right now
source: ISONE · gridstatus- Natural Gas54.2%
- Nuclear18.7%
- Hydro13.7%
- Wind7.4%
- Biomass2.9%
- Other1.0%
- Solar1.0%
- Oil1.0%
Real-time generation mix for the ISONE grid this site draws from, as of Jul 15, 2026, 10:18 PM. ISO-wide, not this facility's own metering. Source: gridstatus.
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 NewsTax 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.
Water use
No measured record exists, so this is a low-confidence model from 17 MW (interconnection capacity): 1.2 L/kWh cooling (cool climate) + 0.45 gal/kWh embedded in US grid average. 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.
Air quality near this site
source: AirNowAir Quality Index from the nearest AirNow reporting area (Boston Metro), 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, Capuano Early Childhood Center in Somerville, is 0.6 mi from this site (213 students). 11 public schools sit within a mile of the site.
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.