Michigan Compiled Laws, Chapter 324. Natural Resources and Environmental Protection § 324.4107

Sec. 4107. (1) The department on receipt of plans and specifications for a sewerage system shall inspect them with reference to their adequacy to protect the public health, and if the public water supply of the city or village is impure and dangerous to individuals or to the public generally, he or she shall inspect the sewerage systems or any parts of the sewerage system and the manner of its operation. If upon inspection the department finds the plans and specifications or the sewerage systems are inadequate or operated in a manner that does not adequately protect the public health, he or she may order the person owning or operating the sewerage system to make alterations in the plans and specifications or in the sewerage systems or the method of operation of the sewerage system as may be required or advisable in his or her opinion, in order that the sewage is not potentially prejudicial to the public health.

(2) The recommendations or orders of the department shall be served in writing upon the owner or operator of the sewerage system and the owner and operator shall comply with the recommendations or orders.