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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.

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Pollution doesn't stop at your neighbor's fence — and our solutions don't either. We work across political boundaries to solve problems at their source.

• Indigenous partnerships for local stewardship

Every action counts — from small donations to big movements. There's still time if we move now.

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'Thirty years ago, this river was polluted. Because we organized, the ecosystem breathes again. I work alongside their team.' — Dr. Robert L.

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