When the Approving Authority determines that a supplier of water has not complied with this regulation, the Approving Authority shall issue a notice of violation, or order in writing to the supplier of water stating the: Regulation being violated; Corrective action required from the supplier of water; and Period of time in which the violation shall be corrected. If a supplier of water fails to comply with the notice of violation or order, the Approving Authority may enter a civil action.