Our Mission

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 partners like you. Your voice is essential.

Our Mission

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

• Legal advocacy driving stronger standards

The water that flows through you connects you to 7 billion people — and countless ecosystems. Join the fight.

Our Mission

'I used to think my voice didn't matter. Then I joined a citizen monitoring program and realized — my action prevents crisis. Now I'm leading others.' — Jennifer M., Volunteer

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.