The Colorado River is a primary water supply for 25 million people in seven states — Colorado, Wyoming, Utah, New Mexico, Arizona, Nevada, and California — as well as Mexico. The river is a cultural icon of the West and a vital economic and environmental resource. Photos courtesy USBR.

Law and Policy	River use Management and Planning
Regional Hydrology and Geography	Climate Variability and Change
Drought Impacts and Management	Restoration and Conservation
Management and Research Organizations	Additional Resources
WWA Research and Projects