气候变化领域集成服务门户

Arizona, along with its neighbors Nevada and California, which make up the Lower Colorado River Basin and historically has used the most water, voluntarily cut usage by 3 million acre-feet over the next three years, about 14 percent of the region’s supply, in exchange for federal funding. At the same time, the region is negotiating new guidelines for the entire system that will go into effect in 2027, after the current guidelines expire.