N.J. Stat. § 48:2-23
The board may, after public hearing, upon notice, by order in writing, require any public utility to furnish safe, adequate and proper service, including furnishing and performance of service in a manner that tends to conserve and preserve the quality of the environment and prevent the pollution of the waters, land and air of this State, and including furnishing and performance of service in a manner which preserves and protects the water quality of a public water supply, and to maintain its property and equipment in such condition as to enable it to do so.
The board may, pending any such proceeding, require any public utility to continue to furnish service and to maintain its property and equipment in such condition as to enable it to do so.
The board, in requiring any public water utility to furnish safe, adequate and proper service, may require the public water utility to retain in its rate base any property which the board determines is necessary to protect the water quality of a public water supply.
N.J.S. § 48:2-23