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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. Every contribution matters.

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We believe that nature can heal if we remove barriers. Our 20-year track record shows that change happens.

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Join thousands of climate leaders pushing back for justice.

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'Thirty years ago, this river was polluted. Thanks to this organization, the ecosystem breathes again. I watch the difference daily.' — Dr. Robert L.

The science is clear: healthy water systems feed us, sustain us, and deserve our protection. We predict risks so nature can recover.