Bill
SB 221
Montana law SB 221 revises the state's environmental policy act framework governing project review and impact assessment procedures, now effective as of May 2025.
SB 221 revises Montana's environmental policy act, which is the state's primary framework for environmental impact assessment and review of major projects. The bill modifies procedural requirements, timelines, or substantive standards that govern how state agencies evaluate environmental consequences of proposed development. As of May 1, 2025, the bill has been signed into law by the Governor.
Montana's environmental policy act affects permit decisions for infrastructure, energy, mining, and development projects across the state. Changes to this framework can meaningfully alter how quickly projects move forward, what environmental protections apply, and how much public input occurs in the decision-making process. The law's revisions will likely impact economic development timelines and environmental review standards for years to come.
Compiled from official sources — confirm details with the bill’s official record.
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