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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. Learn how you can join.

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We believe that nature can heal if we give it the chance. Our decade of victories shows that change happens.

• Real-time data networks of water quality shifts

The water that flows through you connects you to 7 billion people — and future generations. Protect it with us.

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'Thirty years ago, this river was polluted. Because we organized, children can swim safely. I work alongside their team.' — Commissioner James

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