What are water quality certificates? When water serves a certain purpose, such as swimming water or drinking water, people that use it need to know whether it is safe. A water quality certificate is a piece of paper that is given out by a certified agency for water quality assessment, after the assessments have taken place, when the company is content about the water quality. These certificates show people that water is safe to swim in or to drink. Water quality certificates are given out for example to pool owners. Bottled water sometimes includes a safety brand on the bottles, which shows that a certificate has been given to the supplying company.
In this pie chart you can see, which purposes domestic water serves?