Private water supplies

Types of premises

As there are different premises in which private water supplies are used they have been characterised as follows:

Single private dwelling

These do not require routine monitoring or a risk assessment. However, a sample or risk assessment can be undertaken at the premises owner's request.

Small domestic supply

If water is supplied to more than one domestic dwelling, a risk assessment is required. Water sampling and analysis will cover five basic parameters plus any other factors of concern identified by the risk assessment. The supply will be monitored at a minimum frequency of once every five years, or more frequently dependent upon the risk assessment.

Large supplies

(Average daily supply volume greater than 10 cubic metres) and commercial premises (The private supply is used for commercial purposes).

A full risk assessment is required and relevant sampling and monitoring undertaken. However, both check and audit monitoring will be required for these supplies, the frequency of sampling being determined by the supply volume and assessed risks:

  • Check Monitoring: sampling undertaken to ensure the wholesomeness of the water
  • Audit Monitoring: determines whether the water supply meets the relevant water standards of the Private Water Supplies Regulations 2009. The range of tests which may need to be undertaken for audit monitoring is extensive

Private distribution systems

This is where drinking water is taken from a large water provider and then distributed to others, usually by using a pipe network. This type of system may be found for example at caravan sites and on private estates. Sampling requirements will be determined by the results of a full risk assessment of the distribution system.

Last updated: ‎21‎/‎12‎/‎2017‎ ‎11‎:‎18‎