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Colorado River basin

January 1, 2026

Flowing 1,450 miles through seven states and 30 Tribal Nations, the Colorado River is known as the lifeline of the Southwest. The river delivers water to 40 million people, irrigates approximately five million acres of farmland, supports a trillion-dollar economy, and supplies hydroelectric power to millions. Its drainage basin stretches across 250,000 square miles of diverse ecosystems, providing habitat for thousands of plant and wildlife species. However, increasing temperatures have altered the amount and timing of annual snowmelt and streamflow, exacerbating drought conditions and diminishing reservoir storage levels. Over time, less water becomes readily available for the communities, ecosystems, and economies that rely on the river’s consistent flow.

Publication Year 2026
Title Colorado River basin
Authors Sierra Olivia Brown
Publication Type Report
Publication Subtype Federal Government Series
Index ID 70273814
Record Source USGS Publications Warehouse
USGS Organization Southwest Climate Adaptation Science Center
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