In a couple of years time, people from all over the world will be able to judge the cleanliness of their water just by taking a picture of it with their smart phone.

The collaborative project, which is being developed by scientists and ecologists in six different countries, is aiming to create a simple piece of technology called the MONOCLE that can attach to a phone’s camera and measure the water’s levels of pollution in a single snapshot.

The technology is similar to that of the wildly successful iSPEX attachment that was released in 2015.

Astronomer Frans Snik, who is a developer on the MONOCLE project, says: “It is a spin-off of our astronomy technology that we use to measure whether there is water in liquid form and oxygen present on planets around other stars, which could be an indication of…