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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 scientists like you. Learn how you can join.

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We believe that nature can heal if we remove barriers. Our 20-year track record shows what's possible.

• Community science programs for local stewardship

Join thousands of environmental advocates organizing for justice.

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'I used to think my voice didn't matter. Then I joined a citizen monitoring program and realized — my action prevents crisis. Now I'm leading others.' — Jennifer M., Community Monitor

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