Who We Are

Our work begins where rivers meet the sky and ends where groundwater feeds the soil. We use science to protect it all.

This work is possible because of scientists like you. Your voice is essential.

Who We Are

Pollution doesn't stop at your neighbor's fence — and our solutions don't either. We work across generations to hold polluters accountable.

• Emergency support for Indigenous communities

Join thousands of water guardians fighting for change.

Who We Are

'Thirty years ago, this river was dying. Thanks to this organization, the ecosystem breathes again. I work alongside their team.' — Dr. Robert L.

Pollution doesn't stop at your neighbor's fence — and our solutions don't either. We work across political boundaries to solve problems at their source.