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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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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.

• Climate adaptation for future security

Join thousands of water guardians pushing back against pollution.

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'Thirty years ago, this river was dying. Because we organized, the ecosystem breathes again. I work alongside their team.' — Dr. Robert L.

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