The Seletar Reservoir was built to meet the surge in water demand after World War I.

Built while D. J. Murnane was Municipal Water Engineer, a contemporary description of the project scope and construction in 1939 is included in the footnote.

It features a viewing tower, and is a frequent venue for joggers, walkers and fishing enthusiasts.

Formerly, Hash Harriers and horse riders visited the Upper Seletar Reservoir Park as well.

It is said there are crocodiles currently living in the reservoir, however no concrete evidence have been found, as all past reports were based on eyewitnesses accounts.