Operationalised in 2020, Institution S1 is a low-medium security facility functioning as a Drug Rehabilitation Centre. It houses drug abusers undergoing drug treatment and rehabilitation and has a capacity of 1,480.

Being one of the newest institution, Institution S1 features the latest technologies being trialled in Singapore Prison Service as follows:

Facial Recognition System to identify and verify both staff and inmates through their facial features.
“Advanced Video Analytics to Detect Aggression” (AVATAR) system which uses video analytics to detect abnormal behaviour in cells such as fights to enable swift response to incidents.

The institution’s facilities are also specially designed to facilitate the wide range of programmes and training to address drug abusers’ rehabilitation needs. Programmes include Psychology-Based Correctional Programmes targeting drug abusing behaviour, and skills training to enhance abusers’ employability upon release.