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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 donations 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.

• Policy research driving enforcement

Every action counts — from small donations to big movements. The future is ours if we organize today.

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'I used to think my voice didn't matter. Then I joined a citizen monitoring program and realized — my data prevents extinction. Now I'm leading others.' — Jennifer M., Volunteer

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