evidence: Access to safe and quality drinking water is a fundamental requirement and a basic human right. Water quality is determined by its biological, physical, and chemical properties. Colombo Municipal Council (CMC) area consists of the largest population who utilize pipe-borne water supplied by the National [...] Board (NWS&DB) is the main government organization responsible to provide safe piped- borne water in Sri Lanka. The NWS&DB supplies water to 34% of the country’s population, while local authorities and community water supply schemes account for another 10%. Most of the cities and their suburbs are supplied with treated water by NWS&DB. People who are living in rural areas use their own water supplies, most frequently sourced from groundwater such as shallow wells and deep wells. People who are living in the dry zone of Sri Lanka, use water in irrigation tanks for bathing and household consumption (Ellawala & Priyankara, 2016). [...] Pipe-borne treated water in Sri Lanka is suitable for human consumption