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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 volunteers like you. Learn how you can join.
Join Us
The science is clear: healthy water systems feed us, sustain us, and deserve our protection. We predict risks so nature can recover.
- Long-term scientific monitoring of water quality shifts
The water that flows through you connects you to 7 billion people — and future generations. Protect it with us.
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'Thirty years ago, this river was polluted. Because we organized, native fish are returning. I bring my grandchildren to witness it.' — Elder Maria
Pollution doesn't stop at your neighbor's fence — and our solutions don't either. We work across political boundaries to hold polluters accountable.