美国加利福尼亚州工农业和城市生活用水量,每年约为493亿立方米。其中垦务局中央河谷工程、科罗拉多河梯级工程和加州投资兴建的水利工程提供的水量为185亿立方米,占全州总用水量的37.5％。加州的供水企业共有2500个。其中757个企业由城市或州水管理区管理。其余的是私人供水企业或股份公司。 The water, industrial, agricultural and urban living in the United States, California, amounts to 49.3 billion cubic meters a year. Among them, the Reclamation Central Valley Project, the Colorado River cascade project and California-invested water conservancy project provide 18.5 billion cubic meters of water, accounting for 37.5% of the total state water consumption. There are 2,500 water supply companies in California. 757 of them are managed by city or state water management zones. The rest are private water supply companies or stock companies.