Robotic swans silently protect Singapore’s lakes

Singapore recruits swanbots to test water quality

In Singapore, AI meets nature in the most elegant way: a fleet of five robotic swans silently patrols reservoirs, monitoring water quality in real time – all while blending seamlessly into the natural environment – as part of the Smart Water Assessment Network (SWAN) project.

Maintaining water quality, especially in urbanized landscapes, is highly challenging since water bodies are exposed to varying sources of pollutants from urban run-offs and industries. Simultaneously, active recreational use of these water bodies promotes urban livability in the cities that requires maintenance of clean water and aesthetically pleasing surroundings. Several methods and protocols in monitoring pollutants are already in place. However, the boundaries of extensive assessment for the water bodies are limited by labour intensive and resource exhaustive methods. To ensure good quality, large coverage and safety of the water bodies, NUS researchers have developed an innovative system for monitoring pollutants is required for better management and sustainability. NUSwan – New Smart Water Assessment Network is an innovative concept on spatial-temporal water quality monitoring. Building upon aesthetics and recreation, NUSwan is a comprehensive solution to maximize use of resources and cost effectiveness. It is a simple yet powerful tool to observe the water environment: its ability to collect data according to directed mission in real-time allow interactive sampling at any location of interest. Besides, it has the capability of performing simultaneous multi-node, high speed sensing for observing concentration gradients for better characterization and detection of time varying hotspots.

Equipped with advanced sensors, the swanbots measure pH, dissolved oxygen, chlorophyll, and turbidity, transmitting data wirelessly for instant analysis. This continuous monitoring helps authorities detect pollution early, maintain ecosystem health, and ensure safe water for millions. The robots have been designed to be as autonomous as possible, and to cover wide expanses of water without human intervention. However, researchers say they can also control the fake swans by remote control, should they need to call their mechanical charges over for updates or repairs. According to the robots’ developers, the swans are sturdy enough to survive encounters with kayaks and small boats. But their main advantage is that there is no longer need to send scientists out in a boat to collect water samples manually.

What makes this truly remarkable is the fusion of AI, robotics, and design: the swans operate autonomously 24/7, yet look like natural wildlife. Residents and visitors can enjoy Singapore’s lakes without noticing the technology working behind the scenes. This approach shows how AI can quietly enhance sustainability, turning cities into smarter, greener, and more resilient spaces. It’s not just automation – it’s intelligent environmental stewardship. By using AI-driven robotics that harmonize with nature, Singapore is demonstrating the future of urban innovation: technology that protects the planet while respecting its beauty.