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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 community members 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 rebuild what was lost.

• Legal advocacy driving stronger standards

Join thousands of water guardians pushing back 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 data prevents harm. Now I'm inspiring others.' — David T., Water Guardian

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