Los Angeles, Orange, Riverside, San Bernardino
Other Location Info
The South Coast AQMD has jurisdiction over an area of approximately 10,743 square miles, consisting of the four-county South Coast Air Basin (Basin) (Orange County and the non-desert portions of Los Angeles, Riverside and San Bernardino counties) as defined in California Code of Regulations, Title 1 7, section 60104, and the Riverside County portions of the Salton Sea Air Basin (SSAB) and Mojave Desert Air Basin. The Basin, which is a subarea of South Coast AQMD's jurisdiction, is bounded by the Pacific Ocean to the west and the San Gabriel, San Bernardino, and San Jacinto mountains to the north and east. It includes all of Orange County and the non-desert portions of Los Angeles, Riverside, and San Bernardino counties. The Riverside County portion of the SSAB is bounded by the San Jacinto Mountains in the west and spans eastward up to the Palo Verde Valley. A federal non-attainment area, known as the Coachella Valley Planning Area, is a subregion of Riverside County and the SSAB that is bounded by the San Jacinto Mountains to the west and the·eastern boundary of the Coachella Valley to the east.