For the purpose of providing an adequate water supply or of acquiring, maintaining or enlarging a waterworks system, including chronically noncompliant waterworks, as defined in § 32.1-167, any locality, in addition to other powers conferred by law, may acquire, as provided in § 15.2-1800, within or outside or partly within and partly outside the limits of the locality, the property, in whole or in part, whensoever acquired, of any private or public service corporation operating a waterworks system or chartered for the purpose of acquiring or operating such a system. Such property shall include its lands, plants, works, buildings, machinery, pipes, mains, wells, basins, reservoirs and all appurtenances thereto and its contracts, easements, rights and franchises, including its franchise to be a corporation, whether such property, or any part thereof, is essential to the purposes of the corporation or not. However, any locality condemning property hereunder shall furnish water, at appropriate rates, to the customers of any water company whose property is condemned. The provisions of § 25.1-102 shall not apply in the case of condemnation of an existing water or sewage disposal system in its entirety.