Traditional water quality test results tell you what was happening at the beach yesterday. More real-time answers can be a boon for public health.
Kumbh Mela is the world's largest congregation of people – so large, it's visible from space. However, river pollution is a major issue here and new solutions are needed.
Red tide and a blue-green algae outbreak are fouling hundreds of miles of coast, killing fish and driving tourists away from beaches. Some of the causes are natural, but human actions play a big role.
An audit of Sydney's drinking water has found worryingly high salinity. If the biggest water catchment in the country has problems, what about regional and rural Australia?
Can community-led research help address Canada's Indigenous water security issues? One project from the Inuit community of Rigolet in Labrador suggests it can.