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© 2026 Changi Airport
CAG continually looks to strengthen the long-term water resilience of Changi Airport through the adoption of water-efficient technologies to reduce water consumption, while building on existing wastewater and condensate recycling capabilities. These efforts are undertaken in close partnership with various stakeholders within the airport ecosystem towards achieving a circular water economy at Changi.
Installation of water-efficient taps
When opportunities arise, we transition our water fittings to more efficient models to reduce water consumption. For example, in a previous upgrading exercise for airside washrooms, we replaced 172 manual taps with contactless taps.
The new taps discharge only 2 litres of water per minute, compared to 5 litres per minute for the older manual taps. This translates to nearly 3,600 m3 of water saved annually across the upgraded toilets.
Recovery of condensate water from AHS
The condensate water from air handling stations (AHS) has been identified as a source of water that can be recovered as part of Changi’s water recycling efforts. Six AHS at Terminal 2 have been designed so that condensate water will be recovered and pumped to top-up the makeup water of the cooling towers.
As NEWater – Singapore’s high-grade treated used water – forms a significant share of the source of water used for operational consumption, the recovery of condensate water from the AHS would reduce the need to utilise fresh NEWater for the cooling towers. This recovery process saves over 10,000 cubic metres of water annually, a volume equal to 4 Olympic-sized swimming pools.
AHS condensate water is captured and used as makeup water for cooling towers.