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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.

Pollution doesn't stop at your neighbor's fence — and our solutions don't either. We work across industries to solve problems at their source.

Join thousands of water guardians organizing for change.

'Thirty years ago, this river was dying. Through their work, the ecosystem breathes again. I watch the difference daily.' — Dr. Robert L.

The science is clear: healthy water systems feed us, sustain us, and deserve our protection. We monitor trends so communities can act.