Va. Code § 15.2-843
The department of public utilities, if and when established, shall be under the supervision of a director of public utilities. Such department shall be in charge of construction, operation, maintenance and administration of all public works coming under the general category of public utilities, owned, operated and controlled by any such county or district or any sanitary district of such county. Such department shall be responsible for the administration of the affairs of the sanitary districts, including but not limited to water systems, sewer systems, sewage disposal systems, garbage and any other sanitary district functions not assigned or administered by other departments or agencies. If the county has a division of fire protection and a fire chief under the provisions of § 15.2-842 then such fire protection shall not be under the department of public utilities.
Va. Code § 15.2-843