There are many regulations which apply to the supply of drinking water many of which are
"Acts of parliament" and can lead to prosecution if not complied with.
It is the responsibility of the site owner to ensure that the drinking water* will not cause harm.
To ensure a safe drinking water supply The Private Water Regulations 2016 sets out maximum prescribed concentrations or values for chemical and microbiological parameters. These regulations cover all water supplies intended for human consumption.
* Drinking water is defined as water used for domestic purposes; drinking, food preparation, washing.