Mich. Comp. Laws § 324.3903
The department shall promulgate rules to implement this part. The rules may further restrict the nutrient content and other contents of cleaning agents and water conditioners to prevent unlawful pollution and control nuisance growths of algae, weeds, and slimes that are or may become injurious to other lawful water uses; to prevent cleaning agents and water conditioners, separately or in combination with other substances, from rendering or tending to render any waters of this state harmful or inimical to public health, animal or aquatic life, or beneficial water uses; and to minimize any hazard to the health or safety of users of the cleaning agents or water conditioners. The burden of proof is on a manufacturer of a cleaning agent or water conditioner, before distribution for sale or use in this state, to establish that its contents comply with this part and rules promulgated under this part, and will not or is not likely to adversely affect human health or the environment. A person shall not sell or distribute for use in this state a cleaning agent or water conditioner in violation of a rule promulgated under this part.
MCL 324.3903