(1) All water-carried sewage shall be disposed of by means of a public sewerage system or an approved sewerage disposal system which is constructed and operated in conformance with applicable state and local laws, ordinances and regulations.

(2) Non water-carried sewage disposal facilities shall not be used except where water-carried disposal methods have been determined by the health authority to be impractical or impossible. Under such conditions, only facilities which have been approved by the health authority shall be used and operation of these facilities shall be in conformance with applicable state and local laws, ordinances and regulations.