Montana Environmental Impact Statement regulations & environmental compliance analysis

Montana Environmental Impact Statement: What you need to know

Governing Law and Regulations

Montana Environmental Policy Act (MEPA) Montana Code Annotated (MCA): 75-1-101 to 75-1-220

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MEPA: Administrative Rules of Montana (ARM) 17.4.601 to 17.4.636

Overview: ARM 17.4.601 to 17.4.636

General requirements: ARM 17.4.607

Significance of impacts: ARM 17.4.608

Identifying the need for an environmental assessment (EA): ARM 17.4.607(3)

Exemptions: ARM 17.4.607(5)

EA: ARM 17.4.609

Public review: ARM 17.4.610

Environmental impact statement (EIS) scope: ARM 17.4.615

Draft EIS contents: ARM 17.4.617

EIS review: ARM 17.4.620

Record of decision: ARM 17.4.629

Fees: ARM 17.4.701 to 17.4.703

Regulatory Agencies

Montana Department of Environmental Quality (DEQ) Permitting and Compliance Division

Montana Department of Natural Resources

U.S. Environmental Protection Agency (EPA) Region 8

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rule. Montana has established the Montana Environmental Policy Act (MEPA), which is similar to the National Environmental Policy Act (NEPA). MEPA applies to any major state action that will have a significant impact on the environment. Those undertaking such action must prepare either an environmental assessment (EA) of the project or a more in-depth environmental impact statement (EIS).

Administration and enforcement. DEQ is responsible for administering and enforcing the MEPA rules. DNR retains some administration authority in limited cases, but the rules are the same regardless of the administering entity. EPA Region 8 administers and enforces NEPA in Montana.

State Requirements


ARM 17.4.601 to 17.4.636

MEPA is the state counterpart to NEPA. The ...

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