Maine lawmakers are moving forward with legislation that would temporarily halt the construction of large-scale data centers, a proposal that could set a precedent for other states grappling with rising energy demand and infrastructure strain.
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The bill, known as L.D. 307, was recently passed by the state legislature and would pause permitting for new data centers with loads of 20 megawatts or greater until Nov. 1, 2027. If signed into law by Gov. Janet Mills, the measure would represent the first statewide moratorium on data center construction in the United States.
The proposed 18-month pause is intended to give policymakers time to study the broader impacts of rapid data center growth, including pressure on electricity prices, grid reliability and the state’s greenhouse gas reduction goals.
Under the legislation, state agencies and municipalities would be prohibited from issuing permits for large data center developments during the moratorium period. The law broadly defines data centers as facilities housing electronic equipment used to process, store and transmit digital information, along with the environmental systems required to maintain operations.
The bill also calls for the creation of a Maine Data Center Coordination Council, which would evaluate how such developments affect ratepayers, electric grid stability and environmental outcomes. The council is tasked with delivering a report to the governor ahead of the moratorium’s expiration, including recommendations and potential legislative actions.
Notably, the legislation does not include an exemption for a proposed redevelopment project at a former paper mill site in Jay, Maine — a point of contention given the project’s potential to create jobs and repurpose an underutilized industrial property. Gov. Mills has previously indicated that the absence of such an exemption could influence her decision on whether to sign the bill.
The proposal reflects broader concerns across Maine and the northeastern United States, where both electric and natural gas transmission capacity remain limited. Policymakers are weighing how increased demand from data centers could impact energy availability and costs, particularly as states work to meet aggressive renewable energy and emissions reduction targets.
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At the same time, data centers can offer economic development benefits, including job creation and investment in infrastructure. In some cases, these facilities can also leverage stranded renewable energy resources or contribute to grid upgrades.
Still, the pace of development has raised concerns among regulators and communities. Maine is not alone in reconsidering how to manage this growth. At least a dozen other states are exploring similar measures, while numerous local governments have already enacted temporary bans or restrictions on new data center projects.
At the federal level, members of the Congressional Progressive Caucus have introduced legislation that would halt new data center construction until national regulations governing artificial intelligence are established.
Industry observers note that while Maine’s proposal may be temporary, it signals a shifting regulatory landscape that developers must navigate carefully. The outcome of the bill — whether signed, vetoed or revised — could influence policy decisions nationwide as demand for AI-driven infrastructure continues to accelerate.
Originally reported by Brook J. Detterman, Jessalee L. Landfried, Beveridge & Diamond PC - Client Alert--Beveridge and Diamond in The National Law Review.
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