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Which seven U.S. states are included in the Colorado River drainage basin?
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Colorado River
Colorado River, near San Luis, Mex.
The Colorado River drainage basin encompasses parts of seven U.S. states. These states are divided into two groups based on the 1922 Colorado River Compact:
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Upper Basin States:
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Lower Basin States:
These states rely on the river for water resources, and their management of the basin remains a subject of ongoing cooperation and complex legal negotiation.12