Maine set to ban data centers — could become first U.S. state

Maine’s legislature advanced LD 307, a bill that would temporarily halt permitting for new large-scale data centers, positioning the state to become the first in the U.S. to impose such a pause. The proposal targets facilities with an electrical load of 20 megawatts or more and would block state and local approvals while policymakers study impacts.

Under the bill, applications for qualifying projects would not be accepted until 90 days after the first session of the 133rd Legislature adjourns, a timeline that lawmaker sponsors project will amount to roughly November 1, 2027. The measure also establishes a Maine Data Center Coordination Council charged with assessing environmental, grid reliability and ratepayer implications and required to submit recommendations by February 2027. The House committee advanced the bill on an 8-5 vote.

Energy-system concerns are central to the policy case. U.S. data centers consumed roughly 183 terawatt-hours in 2024 — more than 4% of national electricity use — and demand linked to cloud and artificial intelligence workloads is projected to more than double by 2030. Lawmakers argue that new hyperscale facilities can concentrate demand, raise wholesale contract costs and, in some regions, translate into higher residential bills unless grid and tariff structures adapt.

Maine’s move reflects broader state-level pushback: legislators in more than a dozen states have introduced moratoriums or restrictions this session, and several municipalities have enacted local pauses. Proposed large projects in Maine — including campuses that could offer 100–300 MW of capacity — face direct uncertainty from the pause, and developers warn of lost investment and jobs if the measure becomes law.

Market and policy analysts say Maine could set a precedent that accelerates regulatory scrutiny nationwide, but outcomes will hinge on council recommendations, Senate amendments and possible carve-outs for projects already far along. Observers note that federal proposals seeking broader pauses on data center construction have also been floated, meaning the next 12–18 months could reshape where and how hyperscalers site new capacity.