Professor Isha Ray leads the ERG Water Group as an interdisciplinary collaboration focused on the social dimensions of water. Members work on issues of equitable access and efficient, sustainable management of freshwater resources for both humans and the environment. Affordability, reliability, public health impacts and environmental sustainability of supplies are complex issues that require well-grounded local knowledge about how water is used and who decides how to use it. Fieldwork sites span the globe, including the US, Mexico, Colombia, Tanzania, Ghana, India, Bangladesh, the Philippines and China.