Diamond Hill Fresh Water and Salt Water Service Reservoirs (DHSRs) are located at Shatin Pass Road at Tsz Wan San, which occupies a footprint of about 3 hectares.
The existing Diamond Hill Fresh Water Service Reservoir (DHFWSR) was commissioned in 1957 with a capacity of 23,524 m3. At present, fresh water is delivered from Sha Tin Water Treatment Works via Lion Rock High Level Fresh Water Primary Service Reservoir to DHFWSR. It provides fresh water supply to Wong Tai Sin area.
The existing Diamond Hill Salt Water Service Reservoir (DHSWSR) was commissioned in 1957 with a capacity of 21,836 m3. At present, sea water is extracted from the sea water intake at the Tai Wan Salt Water Pumping Station and pumped through DN800 and DN900 salt water mains to DHSWSR for supply to the middle and eastern part of Kowloon area.