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Our work begins where rivers meet the sky and ends where groundwater feeds the soil. We use advocacy to protect it all.

This work is possible because of scientists like you. Your voice is essential.

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

• Early warning systems of water quality shifts

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

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

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