where your water comes from

Water delivered to Sweetwater Authority consumers is obtained from a variety of sources. On average, our customers receive 70 percent of their water from local water supplies, including the Sweetwater River, the Sweetwater Alluvium, and the San Diego Groundwater Formation. The remainder, about 30 percent, is obtained from imported water sources, transported by massive aqueduct systems from the Colorado River or the State Water Project, which carries water from the Sierra-Nevada Mountains through the Sacramento-San Joaquin Bay Delta.