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Waterworks Data

General
Hong Kong Population
(figure from the Census and Statistics Department)
7.50 million
Population Served 7.50 million
Percentage of Population Served over 99.99%
Number of Accounts (as at 31 March 2020)
Domestic 2,771,850
Trade 251,331
Government 13,411
Flushing 39,167
Miscellaneous 2,078
Total : 3,077,837

Waterworks Installations

Installations (as at 31 March 2020) Nos. Total storage capacity /
Total installed capacity
Impounding Reservoirs 17 586.05 Mm3
Water Treatment Works 20 4.68 Mm3/day
Fresh Water Pumping Stations / Houses 151 32.14 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 178 4.35 Mm3
Salt Water Service Reservoirs 54 0.26 Mm3

(Mm3 - million cubic metre)

Water Mains and Tunnel (as at 31 March 2020) Total Length (km)
Fresh Water Mains (20mm - 2,400mm diameter)* 7,016
Salt Water Mains (20mm - 1,200mm diameter)* 1,800
Catchwater 120
Water Tunnel 199

*WSD Mains, Submarine Pipes and Other Department Mains.

Major Installations (as at 31 March 2020)
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 2020) Output Capacity (Mm3/day)
Sha Tin 0.60
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 2020) 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 2020) 16,300 m2