12 Va. Admin. Code § 5-590-330
A. The commissioner or department may require the owner to install, use, and maintain monitoring equipment for the control and testing of water flowing through the water treatment plant to:
§§ 32.1-12 and 32.1-170 of the Code of Virginia.
Derived from VR355-18-003.28 § 1.34, eff. August 1, 1991; amended, Virginia Register Volume 9, Issue 17, eff. June 23, 1993; Volume 37, Issue 20, eff. June 23, 2021.