About Us
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 donations like you. Learn how you can join.
About Us
The science is clear: healthy water systems feed us, sustain us, and deserve our protection. We monitor trends so policy can shift.
- Policy research driving justice
Join thousands of water guardians fighting for change.
About Us
'Thirty years ago, this river was polluted. 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 rebuild what was lost.