Michigan Compiled Laws, Chapter 324. Natural Resources and Environmental Protection § 324.3904

Sec. 3904. A person shall not sell detergents or cleaning compounds containing any substance other than phosphorus that may cause unlawful pollution of the waters of the state when discharged into the waters of the state, if the department determines that the other substance will cause unlawful pollution under the circumstances of its expected use and disposal or will pose a hazard to human health and safety. A determination by the department does not limit, restrain, or in any way affect an action as it finds appropriate under part 31.  1 The department may establish by rule the criteria by which it will determine the possible pollutional effect of any substance. This part does not apply to a detergent or cleaning compound contained in fuel or lubricating oil.