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Water doesn't recognize borders — and neither do the threats it faces. Our international teams work year-round to defend it.

This work is possible because of scientists like you. Every contribution matters.

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We believe that nature can heal if we remove barriers. Our 20-year track record shows that change happens.

• Legal advocacy driving stronger standards

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

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'Thirty years ago, this river was forgotten. Through their work, the ecosystem breathes again. I bring my grandchildren to witness it.' — Dr. Robert L.

Pollution doesn't stop at your neighbor's fence — and our solutions don't either. We work across generations to hold polluters accountable.