State officials may have solved the puzzle of how zebra mussels got into the Colorado River. On July 3, Colorado Parks and Wildlife officials discovered a large number of adult zebra mussels in a ...

These reductions are real. In 2023, Arizona, California and Nevada used only 5.8 million acre-feet of Colorado River water – their lowest combined annual consumption since 1983. The Lower Basin’s ...

Of all the challenges facing the Colorado River, there’s at least one that all stakeholders are working on collaboratively, not competitively — salinity. Since 1974, the seven Colorado River basin ...

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With their funding source under review by the Trump administration, states and the federal government are continuing a mission to better understand how much water flows in the Colorado River, and how ...

A new report from UCLA and the Natural Resources Defense Council found nearly a quarter of Colorado River water is basically provided for free by the federal government.

The Colorado River is in trouble: Not as much water flows into the river as people are entitled to take out of it. A new idea might change that, but complicated political and practical negotiations ...