Mich. Comp. Laws § 323.102

Sec. 2. Any public corporation is hereby authorized to apply for and accept grants or any other aid which the United States government or any agency thereof has authorized or may hereafter authorize to be given or made to the several states of the United States or to any political subdivisions or agencies thereof within the states for the construction of public improvements, including all necessary action preliminary thereto, the purpose of which is to aid in the prevention or abatement of water pollution.