Formed in 1926 as Baldwin Park Water District, Valley County Water District is an independent, special district that provides water services to a portion of the cities of Baldwin Park, Irwindale, West Covina, and Azusa. The District is positioned above a portion of the Main San Gabriel Groundwater Basin, which is its primary source of water.

Today the District serves a population of approximately 57,000 through 12,758 water delivery service connections with water that meets all State and Federal drinking water standards.