Potable water supplied by the Authority are treated to meet norms met by the World Health Organistion for drinkable water. The Ministry of Health and Quality of Life conducts independent tests to ensure CWA’s compliance to the norms met by both the WHO and the Ministry of Environment.

For the purpose of monitoring water quality levels, there is within CWA a scientific service department. Samples from throughout the Island are collected daily and analysis performed on both the quality or raw water resources and quality of potable water supplied.