The South San Joaquin Irrigation District (SSJID), located in Southern San Joaquin County, California, is a non-profit utility that provides irrigation water and domestic water in the Central Valley of California along with hydroelectric power. SSJID was establishing in 1909 to provide irrigation water for 72,000 acres of agricultural area surrounding Escalon, Ripon, and Manteca, California. In 2005, it started providing domestic water service to South San Joaquin County cities with its membrane filtration water treatment plant.