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 volunteers like you. Together we can turn the tide.

Our Mission

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

• Community science programs for local stewardship

Join thousands of environmental advocates organizing for justice.

Our Mission

'I used to think my voice didn't matter. Then I joined a citizen monitoring program and realized — my action prevents harm. Now I'm training others.' — David T., Watershed Advocate

We believe that nature can heal if we restore what was lost. Our decade of victories shows that change happens.