Rainfall from the runways and surrounding green areas is collected in the nearby South End Reservoir.

[4] A spring used to exist on the west side of Fort Canning Hill and served as a source of water in the early days of Singapore.

[5] A cache of Javanese-style gold ornaments dating to the mid-14th century was discovered when workers were excavating for the reservoir at Fort Canning in 1928.

Jalan Eunos Service Reservoir was first constructed by the British Government in 1956 at an estimated cost of $4 million to improve water pressure in the Geylang, Katong and Changi areas of Singapore, as the Woodleigh Waterworks, constructed in 1912 and still stands today, was inadequate to channel water to the growing population.

[10] As Singapore had gained independence by then, there were also fears that Malaysia would eventually cut off water supply from its reservoirs despite agreements made beforehand.

[11] In 2014 the Public Utilities Board announced plans for the Murnane Pipeline project, a new 22km long underground water main running from the Murnane Reservoir to Tanjong Pagar in order to meet future demand, which was expected to double from 30 million gallons per day (mgd) to 60 mgd by 2060.

[14][15] The Pearl's Hill Service reservoir was first mooted in 1897, then built in 1898 to provide additional storage capacity and increase water pressure to Chinatown.

[18] Built of granite and concrete at a cost of $300,000, it was 70 feet higher than the Wilkie Road reservoir which it replaced.

[19] When filtered water was first imported from Gunong Pulau in Johor in 1929, it was stored in Pearl's Hill Reservoir.

Rainfall from the runways and surrounding green areas is collected in the reservoir and used for fire-fighting drills and toilet flushing.