Cities conserve as Colorado River reservoir faces 'dead pool' crisis - USA Today

What the report says

USA Today reported that major Southwestern cities are expanding water-conservation measures as Lake Powell, a key Colorado River reservoir on the Utah-Arizona border, reaches historically low late-summer levels. The reservoir was 23.4% full on July 19, according to the report, and further decline could threaten hydropower production and eventually raise the risk of a “dead pool” scenario that would stop river flow through the Grand Canyon.

The article says Phoenix, Tucson, San Diego and Albuquerque are responding with a mix of wastewater recycling, irrigation restrictions, desalination, leak detection, desert landscaping and long-term storage planning. Experts cited by USA Today said residents could see higher water costs, though drinking-water availability is not expected to be broadly disrupted. The crisis also matters beyond the Southwest because Colorado River supplies help irrigate California agriculture, a major source of U.S. fruits, nuts and vegetables.

USA Today noted that the seven Colorado River Basin states have not reached a shared plan for addressing the shortage. Kathryn Sorensen of Arizona State University’s Kyl Center for Water Policy said cities are acting because they are directly responsible for reliable tap water, but she cautioned that urban conservation alone cannot solve a problem in which agriculture uses most diverted river water.

City-level examples include Phoenix’s purification facilities and weather-based irrigation systems; Tucson’s decades-long shift away from grass lawns and its stored Colorado River water; San Diego’s reliance on imported river water, desalination and conservation payments; and Albuquerque’s limits on watering hours and its “Water 2120” planning effort. The report frames these actions as local attempts to prepare while broader river-management negotiations remain unresolved.