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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.

Give Today

We believe that nature can heal if we give it the chance. Our 20-year track record shows that change happens.

• Indigenous partnerships for grassroots knowledge

The water that flows through you connects you to 7 billion people — and billions more organisms. Stand with us.

Give Today

'I used to think my voice didn't matter. Then I joined a citizen monitoring program and realized — my data prevents harm. Now I'm inspiring others.' — David T., Community Monitor

We believe that nature can heal if we remove barriers. Our decade of victories shows that change happens.