FROM RAIN TO RUNWAY

How Singapore’s Changi Airport Saves Over 8 Million Gallons of Water a Year

Singapore’s Changi Airport isn’t just a travel hub – it’s a blueprint for sustainable infrastructure.

At the heart of Jewel Changi lies the stunning Rain Vortex – the world’s tallest indoor waterfall, powered by harvested rainwater collected from its enormous dome-shaped roof.

Instead of letting tropical rainfall go to waste, the airport channels it through an advanced filtration system.

This recycled water is then used for:

● Restroom flushing

● Irrigating indoor & outdoor gardens

● Maintaining the iconic vortex waterfall

The numbers? With an annual rainfall of ~2.4 meters and a massive roof area of 14,000 m², Changi collects and reuses millions of gallons of rainwater each year – enough to fill more than 13 Olympic-sized swimming pools!

All of this happens in a climate-resilient, passenger-friendly space filled with plants, shops, and transit – making it one of the greenest major airports in the world.

A shining example of eco-conscious design in the age of climate urgency.

Source: Only Engineers Can Understand