Selling a property with a private water supply
If you are selling a property on a private water supply it is likely that you will be required to provide proof that the water is wholesome. You can contact your local authority to have a sample taken (there may be a fee for this).
Moving to a property with a private water supply
The local authority where the property is based must have a register of all private water supplies so you can check with them if the property you are moving to is on a private supply and what water treatment already exists.
If you are buying/renting a property on a private water supply we would advise that a sample is taken to show that the water is wholesome before you move in. Your local authority can assist with interpretation of the sample results.
If you are renting a property on a private water supply your landlord has a duty to provide wholesome water. Again, your local authority can help if you think this is not the case.