Connecticut: data centers & your electric bill
The numbers residents cite at hearings — grid, water, and regulator contacts for Connecticut, from the free GridWatch toolkit.
Subscribe by RSS — moratorium changes and community headlines for Connecticut.
As of July 2026 · changes over months · Source: U.S. Data Center Power Map by State — ElectricChoice.com compilation (updated July 2026; CC-BY 4.0). Underlying load research: LBNL 2024 US Data Center Energy Usage Report; rates: EIA
Facility counts vary by directory because each one draws the boundary differently — DataCenterMap lists 44 in Alabama where this table says 35, since it counts small network rooms alongside hyperscale campuses. Cite the TWh figure rather than the facility count when you can; it is the number that speaks to grid impact. Underlying load research is LBNL-2001637 (Dec 2024).
Your regulator
Connecticut Public Utilities Regulatory Authority — website · file a complaint
Official state energy data: EIA Connecticut electricity profile — generation, prices, and consumption from the U.S. Energy Information Administration.
Pushback already happening in Connecticut
| Where | Level | Status | Note | Source |
|---|---|---|---|---|
| Groton | Local | Expiredterm ran to 2023-06-21 | 1-year moratorium on data centers over 5,000 sq ft; lapsed into permanent zoning in Jun 2023 capping buildings at 12,500 sq ft and barring water cooling | Source read 2026-08-04 |
| Morris | Local | Enactedexpires 2028-05-20 | 2-year moratorium covering data centers and battery storage, passed unanimously by the PZC. Driven by farmland and rural character concerns | Source read 2026-08-13 |
| New Haven | Local | Proposed | 12-month moratorium pitched; would bar city departments from accepting or approving data center applications or conversions | Source read 2026-08-04 |
As of August 2026 · changes weekly — re-check before citing
Illustrative rather than exhaustive — dozens of localities churn weekly, and this tracks the ones we have read a source for. **Each row carries its own provenance.** Rows showing a verification date link to the ordinance, the enacting body's own page, or a datable report of the vote, and were read on that date. Rows marked *unverified* came from bulk compilation and have not been checked against a primary source — the locality, the year, and the status may all be off. Verify one of those with the town clerk before citing it as precedent. **Expiry is derived, not asserted.** A row with a documented end date flips to *Expired* on its own once that date passes. A time-limited moratorium whose start date was never documented keeps showing as enacted — that is a known gap, not a claim that it is still in force. Moratoriums are also routinely extended, so an expiry date is the earliest it could have ended, not proof that it did.
Case studies
Groton, CT — A one-year pause turned into a permanent size cap
Groton's Planning and Zoning Commission adopted a one-year moratorium on data centers over 5,000 sq ft in June 2022 — and spent that year writing rules rather than letting it lapse. After a final public hearing in June 2023 the town adopted data center regulations, effective that July, capping data center buildings at 12,500 sq ft. Hyperscale campuses typically run 150,000–350,000 sq ft, so the cap excludes them by size instead of by argument. The moratorium was only the mechanism; the size cap is what holds.
Every data center already built in Connecticut
GridWatch does not yet track a named hyperscale campus in Connecticut, but that does not mean the state has none. DataCenterMap keeps a public directory of existing facilities — street addresses included — for Connecticut.
Browse the Connecticut directory →
Two caveats before you cite it at a hearing: it lists facilities that already exist, so a newly proposed campus will not appear; and it counts a small network room the same as a hyperscale campus, so the facility count is not a measure of power draw or community impact.
What communities in Connecticut have won
- Groton (Multiple) — A hard size cap, not a cheque: data center buildings limited to 12,500 sq ft in the zoning adopted June 2023, after a one-year moratorium. Hyperscale campuses run 150,000–350,000 sq ft, so the cap excludes them by geometry rather than by argument Source 1 · Source 2 · verified 2026-08-05
Latest Connecticut data center news
No Connecticut data-center headlines in this week's national scan — local coverage often runs ahead of it.
Search live Connecticut data center news → GridWatch news feed →
State municipal league: Connecticut Conference of Municipalities
A data center was proposed near you?
The free toolkit walks you through it in five steps: who's really behind the LLC, what it costs your community, what to do this week, and a downloadable action pack — speech, letters, flyer, and CBA targets included.