Our Mission

Every watershed tells a story of hope. We're here to ensure that story has a thriving future.

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

Our Mission

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.

• Long-term scientific monitoring of water quality shifts

Join thousands of environmental advocates fighting against pollution.

Our Mission

'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.

The science is clear: healthy water systems feed us, sustain us, and deserve our protection. We predict risks so policy can shift.