Water is a key basic need for everyone and in the UK most people take it for granted in both quality and availability. People living in the Terai area of Nepal are not so fortunate. For many of these people the quality of water is affected by arsenic that leads to long term health problems. Detecting the presence of arsenic in drinking water in a reliable, repeatable, and low cost way is a major challenge. As a member of the team trying to develop a solution that local people will use there is a need to understand the local context and capture it in such a way that the scientists can develop an appropriate technology.
The background is covered well in the following article posted on the Wellcome Trust web site (the funder of the project).
What has this got to do with photography? Perhaps an image may be used to help communicate between science and the community. The challenge is to produce a set of images that will bridge the the gap between science and users.