Our Mission

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

This work is possible because of scientists like you. Learn how you can join.

Our Mission

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 stronger standards

Join thousands of water guardians fighting for justice.

Our Mission

'Thirty years ago, this river was forgotten. Thanks to this organization, the ecosystem breathes again. 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 industries to hold polluters accountable.