Considering the water quality delivered to the tap, it is no wonder that Hong Kong people prefer bottled water, and boil water everyday.
Whilst the quality of our drinking water provided by our water utility (WSD) may reach world class standards, what comes out of the tap is a different matter. Improved plumbing systems, piping, tanks, coupled with mandatory maintenance are required to rebuild the confidence to use the potable water provided, learn more here. In my office the water (see photo above) is very poor indeed, would you drink it? And boiling all that water demands a lot energy, we are looking at approx. 9.28 MW everyday just to boil water.
Typically one main water storage water tank is provided in high rise buildings with thousands of residents. The building owner or operator may opt for a voluntary scheme, operated by WSD, known as the Quality Water Recognition Scheme for Buildings (QWRSB). Of course, that requires interrupting the occupants water service to conduct the necessary maintenance and tank cleansing work.