This dataset includes the boundaries and names of the California air basins in the Southern California Association of Governments (SCAG) region, as defined in state statute and regulation as of October 2014. See the California Health and Safety Code, Section 39606 et seq. and California Code of Regulations, Title 17, Section 60100 et seq. Shapefile coverage. The dataset has been updated using as main source the: California Environmental Protection Agency Air Resources Board maps (http://www.arb.ca.gov/knowzone/basin/basin.htm).