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Waterworks Data

General (as at 31 December 2019)
Hong Kong Population
(figure from the Census and Statistics Department)
7,500,700
Population Served 7,499,700
Percentage of Population Served 99.99%
Number of Accounts (as at 31 March 2019)
Domestic 2,739,960
Trade 249,147
Government 13,269
Flushing 38,169
Miscellaneous 2,161
Total : 3,042,706

Waterworks Installations

Installations (as at 31 March 2019) Nos. Total storage capacity /
Total installed capacity
Impounding Reservoirs 17 586.05 Mm3
Water Treatment Works 20 5.31 Mm3/day
Fresh Water Pumping Stations / Houses 153 32.15 Mm3/day
Salt Water Pumping Stations / Houses 35 2.09 Mm3/day
Fresh Water and Salt Water Pumping Stations / Houses (Combined) 7 0.30 Mm3/day
Fresh Water Service Reservoirs 174 4.33Mm3
Salt Water Service Reservoirs 54 0.26 Mm3

(Mm3 - million cubic metre)

Water Mains and Tunnel (as at 31 March 2019) Total Length (km)
Fresh Water Mains (20mm - 2,400mm diameter)* 6,943
Salt Water Mains (20mm - 1,200mm diameter)* 1,775
Catchwater 120
Water Tunnel 199

*WSD Mains, Submarine Pipes and Other Department Mains.

Major Installations (as at 31 March 2019)
Impounding Reservoirs Storage capacity (Mm3)
High Island 281.12
Plover Cove 229.73
Shek Pik 24.46
Tai Lam Chung 20.49
Water Treatment Works (as at 31 March 2019) Output Capacity (Mm3/day)
Sha Tin 1.23
Pak Kong 0.80
Tai Po 0.80
Tuen Mun 0.37
Au Tau 0.33
Tsuen Wan 0.32
Yau Kom Tau 0.25
Ma On Shan 0.23
Ngau Tam Mei 0.23
Pumping Stations (as at 31 March 2019) Installed capacity (Mm3/day)
Muk Wu No.2 & No. 3 5.89
Tai Po Tau, Tai Po Tau No.2, No.3 & No.4 4.12
Tai Mei Tuk & Tai Mei Tuk No.2 2.17
Harbour Island 2.05
Lung Cheung Road - Mechanical & Electrical Workshop (gross floor area) (as at March 2019) 16,300 m2