This air pollution control vehicle, parked outside Burbank City Hall, belonged to the county of Los Angeles, which created Los Angeles County Air Pollution Control District in 1947. The agency recorded emissions from both stationary sources--such as large power plants and refineries--and mobile sources, including construction equipment, trains, and airplanes. In 1976, state legislation was passed to expand the agency, and the South Coast Air Quality Management District was born. The modern agency monitors air pollution Los Angeles and Orange counties, and in areas in parts of Riverside and San Bernardino counties. Late 1940s. black and white photograph. 8 x 10 in.