The Private Water Supplies Regulations 2009 No. 3101

PART 2 Monitoring

Large supplies and supplies to commercial or public premises

9.  In the case of a private 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 to premises where the water is used for a commercial activity or to public premises,

the local authority must monitor in accordance with Schedule 2 and carry out any additional monitoring that the risk assessment shows to be necessary.