Mich. Comp. Laws § 324.4501: “Municipality” defined.

Sec. 4501.

The term "municipality" or "municipalities" as used in this part means and includes a county, city, village, township, school district, metropolitan district, port district, drainage district, authority, or other governmental authority, agency, or department within or of the state with power to acquire, construct, improve, or operate facilities for the prevention or abatement of water pollution, or any combination of such governmental agencies.