Sampling of PWS

The purpose of sampling is to verify that a supply meets the regulatory standards at the time the sample was taken. A passing sample does not guarantee that a supply will be safe to drink at all times. A risk assessment should be used to identify any risks that could make the supply unsafe.  

A passing sample does not guarantee that a supply will be safe to drink at all times.

It is a legal requirement that all Regulated PWS should be sampled annually by the local authority. Exempt supplies may be sampled if the owner requests it. Local authorities are entitled to charge for sampling in order to recover their costs.

What if a Sample Fails?

If you are a relevant person you must inform other owners/users on the supply of the failure and any restrictions the local authority has placed on it (e.g. don’t drink – use bottled water).

You should look at your supply and check that all maintenance is up to date.

For example:

  • Have your filters been changed recently?
  • Is the quartz sleeve clean?
  • Are all tanks secure?

Once you have completed any maintenance you can call your local authority to re-test the water.

If your water supply is not – or may not be – wholesome, the local authority has a duty to serve a notice on you to improve the supply. This will involve you undertaking work to upgrade the supply so that it is fit for use.

Your local authority can provide grant funding to upgrade your supply.