The Colorado River is an important source of water for much of the western United States, including Arizona. The Central Arizona Project (CAP) carries 1.5 million acre-feet of water from the Colorado River to Pima, Pinal, and Maricopa counties each year. Tucson Water distributed 93,250 acre-feet to over 220,000 customers in 2012.
Lake Powell is a major reservoir on the Colorado River. According to the U.S. Bureau of Reclamation Lake Powell is currently only at 42 percent of capacity as of May 20.