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Our work begins where rivers meet the sky and ends where groundwater feeds the soil. We use partnerships to protect it all.

This work is possible because of volunteers like you. Your voice is essential.

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

• Legal advocacy driving stronger standards

Join thousands of environmental advocates fighting against pollution.

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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 contamination. Now I'm leading others.' — Michael O., Water Guardian

Pollution doesn't stop at your neighbor's fence — and our solutions don't either. We work across generations to rebuild what was lost.