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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 volunteers like you. Learn how you can join.

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

• Indigenous partnerships for sovereignty

The water that flows through you connects you to 7 billion people — and billions more organisms. Protect it with us.

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'Thirty years ago, this river was forgotten. Through their work, native fish are returning. I work alongside their team.' — Professor Chen

We believe that nature can heal if we give it the chance. Our decade of victories shows that grassroots action works.