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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. 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.

• Corporate accountability driving justice

Join thousands of environmental advocates fighting for change.

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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 nature can recover.