New London County

Moratoriums and bans

1. Oct. 2026 East Lyme: Ban. The Zoning Commission unanimously amended its regulations to prohibit data centers, including AI data centers and their accessory uses, with no end date; the change was reported Oct 20 and took effect Oct 24, 2026. Officials cited water supply, noise and effects on neighbors; no project had been proposed in town. (WFSB, Oct. 20, 2026; CT Mirror, Oct. 25, 2026)

Updates, newest first

1. Oct. 26, 2026 State of Connecticut Groton Data Center (BITS) · The DAS page lists Groton (GDC) as a Tier II, redundant state data center with backup generation and redundant utility service. (CT Department of Administrative Services (BITS), Oct. 26, 2026)
2. Oct. 25, 2026 NE Edge Millstone Data Center · CT Mirror reported that the Millstone proposal had been abandoned after local pushback and delays, and that neighboring East Lyme's data center ban was partly a reaction to it. (CT Mirror, Oct. 25, 2026)
3. Oct. 2026 East Lyme: Ban · The Zoning Commission unanimously amended its regulations to prohibit data centers, including AI data centers and their accessory uses, with no end date; the change was reported Oct 20 and took effect Oct 24, 2026. Officials cited water supply, noise and effects on neighbors; no project had been proposed in town. (WFSB, Oct. 20, 2026; CT Mirror, Oct. 25, 2026)
4. April 15, 2026 NE Edge Millstone Data Center · A CT Mirror opinion piece stated that the host fee agreement with NE Edge-Waterford, LLC had ended in default and expired under its terms; The Day separately reported the plan was likely over as the agreement expired. (CT Mirror (CT Viewpoints opinion), April 15, 2026; The Day, undated)
5. April 16, 2025 NE Edge Millstone Data Center · The Waterford Board of Selectmen voted 2-1 to allow NE Edge to assign its 2023 host agreement to a subsidiary; NE Edge was reported to have until March 2026 to secure building permits. (FFCCT (repost of The Day), April 17, 2025)
6. Jan. 4, 2024 NE Edge Millstone Data Center · The Siting Council declined, without prejudice, to rule on Dominion's Petition 1586 to redraw the Millstone site boundary for the lease. It said review was premature because so little was known about the data centers and their direct tie to the reactors. (Connecticut Siting Council, Jan. 4, 2024)
7. March 17, 2023 NE Edge Millstone Data Center · Waterford entered a host fee agreement with NE Edge calling for $231 million over 30 years in place of property taxes. (CT Mirror, Jan. 19, 2024)
8. Feb. 16, 2023 NE Edge Millstone Data Center · NE Edge's plan for two data center buildings at Millstone, about 1.5 million sq ft in total, became public. (CT Examiner, Feb. 16, 2023)
9. April 2, 2014 State of Connecticut Groton Data Center (BITS) · The governor's office announced Pfizer would lease Building 230 in Groton to the state for $1 a year, for use as a data center and disaster-recovery site. (Office of Governor Dannel P. Malloy, April 2, 2014)
10. Feb. 28, 2014 State of Connecticut Groton Data Center (BITS) · The State Bond Commission approved $18.25 million to move the state data center from East Hartford to leased space on Pfizer's Groton campus. (CT Mirror, Feb. 28, 2014)

Statewide

Public Act 21-1 (HB 6514, 2021 regular session; approved Mar 4, 2021, effective Jul 1, 2021; codified at CGS 32-286) lets DECD sign 20-year agreements with 'qualified data centers' that invest at least $50M in an enterprise zone or federal opportunity zone, or $200M elsewhere, within five years; terms stretch to 30 years at $200M in a zone or $400M elsewhere. (Connecticut General Assembly, March 4, 2021; Connecticut General Assembly, Office of Legislative Research, Dec. 20, 2024) Under PA 21-1, a qualifying project is exempt from sales and use tax on data center equipment, related services and the electricity it uses, and from local property tax on its real property and IT equipment; projects at the 30-year level also get a 30-year exemption from any future state financial transactions tax. DECD can charge an annual fee of up to $50,000 during the qualifying period. (Connecticut General Assembly, March 4, 2021; Connecticut General Assembly, Office of Legislative Research, Feb. 24, 2021; Connecticut DECD, undated) PA 21-1 requires the owner to sign a negotiated fee agreement with each host municipality before construction starts. The agreement covers how the exempted property tax is paid and the penalties for noncompliance. If a breach is not cured within 180 days, the agreement ends and the property becomes taxable. (Connecticut General Assembly, March 4, 2021; Connecticut General Assembly, Office of Legislative Research, Feb. 24, 2021) The Senate passed the 2021 incentive bill 29-5 on Mar 1, 2021. As of Oct 2026, DECD has reviewed only two applications under the program, and CT Mirror reports that the only project to use the sales tax exemption is Cigna's $386M renovation of an existing data center in Windsor. (CT Mirror, March 1, 2021; CT Mirror, Oct. 25, 2026) SB 1353 (2025), 'An Act Concerning Subsidies for New Electricity Demand', would have rewritten the definitions in CGS 32-286. Among other changes, it would have left out facilities powered by a customer-side (behind-the-meter) supplier unless that supplier adds enough new generation to offset all of the facility's electric use. Energy and Technology reported a substitute bill and sent it to Finance; its final outcome was not confirmed from a CGA status page. (Connecticut General Assembly, 2025) SB 299 (2024 session) would have had PURA begin a proceeding by Jul 1, 2024, working with OCC, DEEP and ISO New England, on how large data centers could affect grid reliability; the committee co-chair said it was written with the behind-the-meter NE Edge plan at Millstone in mind. Energy and Technology approved it Mar 21, 2024; no resulting Public Act was found. (American Public Power Association, March 25, 2024; CT Mirror, March 7, 2024) SB 245 (2026), 'An Act Eliminating Certain Tax Incentives for Data Centers', got a joint favorable report from Energy and Technology on Mar 17, 2026. It was referred to Finance, Revenue and Bonding on Mar 23, 2026 and saw no further action, so it was not enacted. (Connecticut General Assembly, March 17, 2026; Connecticut General Assembly, March 23, 2026) HB 5469 (2026), 'An Act Concerning Colocated Electric Suppliers and Large Electric Load Customers', aimed at loads of 50 MW or more. It would have required PURA licensing of co-located (behind-the-meter) suppliers covering 100% of load from new generation in service on or after Jul 1, 2026. Eversource, UI and municipal utilities would have had to file large-load tariffs by Apr 1, 2027, with 85%/10-year payment guarantees and deposits, and PURA would have had to open a proceeding by Jan 1, 2027. Energy and Technology approved it 26-0 on Mar 19, 2026, and it reached the House as File 421. No Public Act was found. (Connecticut General Assembly, Office of Legislative Research, April 7, 2026; Hartford Business Journal, March 2026) PURA: no Connecticut docket specific to data centers or large-load tariffs was found in the records reviewed. The OLR's Dec 2024 report on electricity demand cites no such docket, and the PURA proceeding in HB 5469 would have been required only if that bill became law. (Connecticut General Assembly, Office of Legislative Research, Dec. 20, 2024; Connecticut General Assembly, Office of Legislative Research, April 7, 2026) Siting: the Connecticut Siting Council has exclusive jurisdiction over the site of a power-generating facility, but reporting describes it as having no authority over a data center on its own. One example is Petition 1533A (ReNew Developers, with Bloom Energy), an 18 MW fuel cell addition at 42 Old Amston Road, Colchester, meant to supply about 99% of the base load of a second data center at the Connecticut Data Park; the Council reopened the matter Jul 20, 2023 and set Jan 16, 2024 as its decision deadline. HB 5469 (2026) said it would not limit the Council's siting authority. (Connecticut Siting Council, Nov. 3, 2023; WFSB, July 15, 2026; Connecticut General Assembly, Office of Legislative Research, April 7, 2026) Senate Majority Leader Bob Duff (D-Norwalk) has announced plans to file legislation for a statewide moratorium on new AI data centers when the 2027 session opens. No bill number exists yet. (Connecticut Public (via NHPR), Oct. 26, 2026; CT Mirror, Oct. 25, 2026) Connecticut data centers →