Maine Gov. Janet Mills Vetoes Temporary Data Center Ban

Maine Gov. Janet Mills has vetoed legislation that would have imposed a temporary statewide ban on certain new data centers, rejecting a proposed moratorium that had been moving through the Legislature.

The veto applies to a bill aimed at pausing the development of large data centers in Maine. Mills’ decision blocks the measure from becoming law unless lawmakers vote to override it under the state’s legislative process.

The action was reported by multiple outlets, including The Portland Press Herald, Bangor Daily News, and Maine Public, which have followed the debate over how the state should handle the growth of energy-intensive computing facilities. National outlets including The Wall Street Journal and The Hill also reported on the veto.

The bill sought to establish a time-limited halt on new data center projects while policymakers considered how to regulate and plan for them. Supporters had framed the moratorium as a way to give the state breathing room to study impacts and set standards before additional large facilities move forward. Opponents argued the pause could send a negative signal to businesses considering Maine for investment.

Data centers have become a flashpoint in state and local discussions across the country because of their size, electricity demand, and infrastructure needs. In Maine, the debate has centered on how to balance economic development with the capacity of the electric grid and long-term planning for major industrial-scale projects.

Mills’ veto matters because it keeps permitting and siting decisions on track under existing rules rather than freezing new proposals statewide. It also sets the terms of the next phase of the policy fight, shifting attention from an immediate halt to questions about what, if any, new regulatory framework lawmakers might pursue.

The decision comes amid broader legislative activity involving multiple policy areas. WGME reported that Mills also vetoed legislation related to sealing criminal history records, underscoring that the data center measure was part of a wider slate of bills reaching the governor’s desk.

What happens next depends on the Maine Legislature’s response. Lawmakers can attempt to override the veto, a step that typically requires significant support. If an override effort fails or is not pursued, the moratorium bill would remain blocked, and supporters would need to craft a new proposal or pursue changes through other legislative or regulatory avenues.

In the meantime, the dispute is likely to keep unfolding at the State House as legislators, communities, and industry stakeholders continue pressing for clarity on how Maine should evaluate and manage large-scale data center development.

Mills’ veto leaves Maine without a temporary statewide pause and ensures the state’s next moves on data centers will be fought through the normal legislative process rather than a blanket moratorium.