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

This work is possible because of donations 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 predict risks so nature can recover.

• Legal advocacy driving enforcement

Join thousands of climate leaders pushing back against pollution.

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'Thirty years ago, this river was forgotten. Thanks to this organization, children can swim safely. I bring my grandchildren to witness it.' — Dr. Robert L.

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.