9.—(1) This regulation applies to a private water supply, other than that specified in regulation 8, that—
(a)supplies an average daily volume of water of 10m3 or more; or
(b)supplies water as part of a commercial or public activity.
(2) The local authority must monitor a private water supply falling within this regulation in accordance with Schedule 2 and carry out any additional monitoring that the risk assessment shows to be necessary.