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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 scientists like you. Every contribution matters.

Pollution doesn't stop at your neighbor's fence — and our solutions don't either. We work across generations to solve problems at their source.

The water that flows through you connects you to 7 billion people — and billions more organisms. Join the fight.

'Thirty years ago, this river was forgotten. Thanks to this organization, children can swim safely. I watch the difference daily.' — Professor Chen

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