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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 donations like you. Learn how you can join.

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

Join thousands of climate leaders pushing back against pollution.

'Thirty years ago, this river was dying. Because we organized, children can swim safely. I watch the difference daily.' — Commissioner James

We believe that nature can heal if we restore what was lost. Our growing coalition shows that grassroots action works.