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DataCentersExposed
Mapped (unverified)colocation

CyrusOne Norwalk

Western Connecticut County, CT

Source: OpenStreetMap

CyrusOne Norwalk is a mapped data center in Western Connecticut County, CT, operated by CyrusOne LLC. DataCentersExposed has documented a 77,778 sq ft footprint at this site.

Reporting by · Updated Jun 14, 2026

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Real parent
CyrusOne LLC
Operator
CyrusOne LLC
Est. capacity
~15-35 MW
Footprint
77,778 sq ft
Utility
Norwalk Third Taxing District
Grid
ISNE
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 Norwalk is a mapped colocation data center in Western Connecticut County, Connecticut, run by CyrusOne LLC. Its reported footprint is 77,778 square feet. The site draws power from the Norwalk Third Taxing District inside the ISNE balancing authority.

Operator chain

The grid behind this site, right now

source: ISONE · gridstatus
Clean right now
64%
Fossil right now
36%
Grid operator
ISONE
  • Nuclear36.1%
  • Natural Gas35.5%
  • Solar9.5%
  • Hydro9.1%
  • Biomass5.3%
  • Wind3.9%
  • Other0.6%

Real-time generation mix for the ISONE grid this site draws from, as of Jun 16, 2026, 4:37 PM. ISO-wide, not this facility's own metering. Source: gridstatus.

In the news

source: GDELT

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

Water use

No public record of this facility's water use. We check state withdrawal reporting for self-supplied sites; municipally supplied sites only become visible through a public-records request to the local water utility — a per-facility request tool is coming. If you have a utility document for this site, send it to us.

EPA permits & violations

source: EPA ECHO

No reported violations as of last sync.

Air quality near this site

source: AirNow
48
O3
Good

Air Quality Index from the nearest AirNow reporting area (Westport), as of 2026-06-10. Regional context — not this facility's own emissions.

Nearest school

source: HIFLD / NCES

The nearest public school, Nathan Hale Middle School in Norwalk, is 0.4 mi from this site (545 students). 4 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.