R 325.10306 Exemption from MCL or treatment technique; required finding.

Rule 306. Exemptions from an MCL or treatment technique other than those prohibited in R 325.10303 may be granted by the director only upon his or her specific finding that all of the following conditions exist: (a) Due to compelling factors, including economic factors, a public water supply is not able to comply with an MCL or treatment technique. (b) A public water supply for which an exemption is requested was in operation on the effective date of the state drinking water standard. (c) The supplier of water demonstrates that the granting of an exemption will not result in an unreasonable risk to the health of persons using the public water supply.