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Water doesn't recognize borders — and neither do the threats it faces. Our local teams work tirelessly to defend it.

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

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We believe that nature can heal if we give it the chance. Our 20-year track record shows what's possible.

• Legal advocacy driving justice

The water that flows through you connects you to 7 billion people — and countless ecosystems. Join the fight.

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'I used to think my voice didn't matter. Then I joined a citizen monitoring program and realized — my voice prevents contamination. Now I'm leading others.' — Michael O., Water Guardian

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