Santa Ana Watershed
Whitewater Watershed Area Santa Margarita Watershed Area
Santa Ana Region is the smallest of the nine regions in the state (2,800 square miles) and is located in Southern California, roughly between Los Angeles and San Diego. Although small, the region's five + million residents make it one of the most densely populated regions. The climate of the Santa Ana region is classified as Mediterranean: generally dry in the summer with mild, wet winters. The average annual rainfall in the region is about 15 inches, most of it occurring between November and March. In very broad terms, the Santa Ana Region is a group of connected inland basins and open coastal basins drained by surface streams flowing generally southwestward to the Pacific Ocean. For additional information try the EPA - WATERS EnviroMapper.
Santa Ana Region affects: Beaumont, Calimesa, Canyon Lake, Corona, Hemet, Lake Elsinore, Murrieta, Moreno Valley, Norco, Perris, City of Riverside, Riverside County and San Jacinto
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