Michigan Compiled Laws, Chapter 325. Health § 325.1019

Sec. 19. (1) If water delivered by or the operation of a public water supply is found not to be in compliance with the state drinking water standards, the department shall require the supplier of water to notify its users of the extent and nature of the noncompliance. Notification of users must be in a form and manner prescribed or otherwise approved by the department.

(2) In addition to the notification under subsection (1), if public education regarding lead is required under R 325.10410 of the Michigan Administrative Code, a supplier of water shall issue a public advisory within 3 business days after the department notifies the supplier of water that an exceedance of the lead action level occurred. Additional public education tasks must be conducted as required under R 325.10410 of the Michigan Administrative Code. A supplier of water shall provide the public advisory under this subsection in a form and manner designed to fit the specific situation and the public advisory must be reasonably calculated to reach all persons served by the public water supply. To reach all persons served by the public water supply, a supplier of water shall use, at a minimum, 1 or more of the following forms of communicating the public advisory:

(3) A notification or public advisory received pursuant to this section or information obtained from the notification or public advisory shall not be used against a person in a litigation, except a prosecution for perjury or for giving a false statement.