Private water supplies

Private water supplies are any supplies of water not provided by the public water supplier. In Northern Ireland less than one per cent of water comes from private water supplies. The DWI monitors private water supplies to ensure they meet standards set within the regulations.

Private water supplies legislation

You can view the legislation relating to private water supplies at the links below:-

The above Regulations implement the Drinking Water Directive (98/83/EC) and Directive 2013/51/Euratom in relation to private water supplies and the DWI is, for certain functions, facilitated by the Environmental Health departments of the district councils.

The DWI holds a register of all known private water supplies in Northern Ireland that come under the Private Water Supplies Regulations. The regulations apply to private supplies that serve more than one household for purely domestic purposes, or are used in commercial food and drink production.

The register includes details on site location, description of the source, purpose for which the water is used, volume used, and any treatment of the supply.

To register a new private water supply, please complete and return the registration form:-

For details on current registered private water supplies and a summary of the drinking water quality of these supplies refer to the DWI annual report:-

Private water supplies enforcement and prosecution policy

This policy details the general principles which will be followed in relation to enforcement and prosecution::-

Guidance and Advice

If you own or use a private supply it is important that you are aware of the quality of the supply and the risks associated with it. Guidance and advice for owners and users is available from the following: 

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