Committee weighs data center limits under Act 250 and PUC oversight
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Summary
A legislative committee debated whether Vermont should regulate large data centers through Act 250 or utility oversight, stressing definitions (MW thresholds), grid capacity, transmission cost-sharing, and invitations to the PUC and ANR for briefings.
A legislative committee spent the session exploring how Vermont should treat data centers, including whether Act 250, the Public Utility Commission (PUC) or other regulators should control large users of electricity.
Speaker 1 said the topic arose after a National Conference of State Legislatures briefing and listed at least two centers in Chittenden County and one in Stowe. Lawmakers questioned whether the bill under consideration targets only very large facilities or unintentionally pulls in smaller, locally beneficial centers. "We need to make sure we define it so we don't lose what we could use as some good small employers," Speaker 1 said.
The committee debated numeric thresholds and examples: several participants described local facilities in the 1–2 megawatt range and warned that a 10-megawatt threshold would be "a big deal" that could capture dramatically different projects. Speaker 6 noted that other jurisdictions wrestled with scale—some regimes cover very large users measured in tens or hundreds of megawatts—and suggested Vermont must set clear size definitions so smaller sites are not swept into restrictive rules.
Members discussed which bodies have authority. Speaker 2 and others recommended inviting the PUC to explain how it regulates electricity demand and whether permitting, rate structures or transmission planning already give the state levers to limit or condition large users. Speaker 4 summarized the status of prior work on related topics and the need to coordinate with the House Energy and Technology Committee, which Speaker 2 said was preparing its own vote.
Beyond thresholds and regulatory jurisdiction, the committee raised grid and water concerns. Speakers warned that very large data centers can require new transmission that might increase local electric rates or obligate Vermont to share costs across the ISO New England system. Water use, including the possibility that industrial wells could draw down aquifers, was also flagged as a local environmental risk that would need ANR input.
Some members urged caution about using strong prohibitions that could label the state "unfriendly to technology," while others recommended a measured pause to create a regulatory framework and consider incentives tied to on-site generation or efficiency. Technological change—more energy-efficient chips and other advances—was cited as a reason to avoid locking long-term bans into law.
The committee agreed to request briefings from the PUC, the Land Use Review Board (or its successor), the Agency of Natural Resources and the tax department and to monitor developments in the House Energy and Technology Committee before advancing legislation. The session closed with direction to gather technical information on thresholds, transmission impacts and water use for future deliberations.