Before discussing the drinking water quality in Hong Kong, it is important to note if the people in Hong Kong are satisfied from the drinking water which is made available to them.
In Hong Kong, there have 2 main source of water are supply from Mainland Guangdong and rainfall from nature. The Dongjiang raw water supplied to Hong Kong since 1960s. Currently, about 70-80% fresh water is comes from Dongjiang and conformed to the relevant national standard based on the agreement between the Hong Kong Special Administration Region Government and Guangdong Authorities. The raw water is suitable for drinking after the treatment by Hong Kong’s treatment works. At the same time, we have owned 17nos. And totally allowed storage in maximum around 580 million cubic meter volume of local impounding, reservoirs were located at different district within the Hong Kong boundary.
After collecting the raw water and distribute for public use, the rigorous water treatment process would be present and responsible by the Water Supplies Department (WSD). The water treatment was basically including coagulation, flocculation, and sedimentation of impurities. During the process, the chemicals dosing have been made for disinfecting, balancing the pH of water and preventing on the bacterial growth in the distribution system. On behalf of the safest water supplies in the world, WSD is committed to supplying the drinking water in odorless, clear and free from bacteria in according and conforming to the Guidelines for Drinking-water Quality recommended by the World 6 Health Organization. In order to maintain the high quality drinking water for the public all the time, WSD has a comprehensive program for monitoring on the water treatment processes and the distribution network to consumers.
The water samples are routinely collecting from water treatment plants, impounding reservoirs, service main, connection point and domestic end-point. The tested results are strictly followed as the World Health Organization’s recommendations for Drinking-water Quality. It would allow the public rest relived on the drinking water is safe for use with conformity results complying with this reference and international standard.