Private water supplies
Private water supplies are regulated under the Water Industry Act 1990 and The Private water Supplies (Wales) Regulations 2017. Private water supplies are not provided by water companies and can include springs, boreholes, wells, streams, rivers, lakes and land drains. We are responsible for ensuring private water supplies are wholesome for commercial and domestic properties and where it is feasible for us to do so, the sufficiency of a supply.
Domestic properties
Regulation 11 Supplies – Domestic Shared Supplies and Privately Rented Properties
We test private water supplies that provide more than 10,000 litres per day to households at least once a year. If it supplies less than this, then the supply would be tested at least once every five years.
Regulation 10 Supplies – Single Domestic Supply
A private water supply to a single property is tested at least once every 5 years.
Non domestic (commercial) properties
Regulation 9 Supplies
Private water supplies at non domestic properties are tested at least once a year depending on how much water is used and the amount of people using the water.
Fees and charges
Regulation 10 and 11 water supplies
Costs for regulation 10 and 11 water supplies
| Water supply test |
Number of visits |
Cost per visit |
| Supply providing less than 10,000 litres per day |
One visit evey year |
£125.00 |
| Supply providing more than 10,000 litres per day |
Two visits evey year |
£125.00 |
Regulation 9 water supplies
Fees and charges for regulation 9 water supplies
| Water supply test |
Cost per visit (at least once per year) |
| New commercial supplies that we have little or no previous sampling history for |
£314.00 |
| Existing commercial supplies that we have recent sampling history for |
£244.00 |
| Additional sampling to confirm compliance due to a parameter failure |
Cost £45.00 (to include either up to two bacteriological samples or five chemical parameters, additional parameters will be charged at cost) |
Any sampling that is requested outside of our normal sampling suites will be charged at the relevant cost at the time of request.
Changing to a private water supply
If you are changing to a private water supply, or you are a new occupier at a property that uses one, you can download a private water supply form to let us know.
Private water supply form (MS Word, 161KB)
The cost of testing a new water supply is £95.00
More information
You can get more information on private water supplies by contacting us or visiting the following websites: