MI HB5751

Amends the Natural Resources and Environmental Protection Act to expand and clarify definitions related to water pollution control revolving funds, including adding "low-impact development" as a new defined term for stormwater management that mimics natural hydrology.

Modifies the definition of "construction activities" to include design and engineering services, acquisition of plants and landscaping materials, and structural components for sewage treatment, stormwater treatment, and nonpoint source pollution control projects.

Establishes priority ranking criteria for stormwater treatment projects with equal scores, giving first priority to projects that substantially utilize low-impact development, restore or create native habitat, or assist in total maximum daily load compliance.

Requires municipalities to demonstrate project need, cost-effectiveness, and feasibility in project plans for tier I projects and requires documentation of need and cost justification for tier II projects, with costs exceeding justified amounts ineligible for assistance.

Directs the department to develop separate annual priority lists for sewage treatment, stormwater treatment, and nonpoint source projects, with unfunded projects automatically prioritized on the next year's list using the same criteria unless the municipality submits plan amendments.