Definitions for "AQMD"
A group of counties or portion of counties, or an individual county specified in law with authority to regulate stationary, indirect, and area sources of air pollution within the region and governed by a regional air pollution control board comprised mostly of elected officials from within the region. CA
Air Quality Management District:  Created and entitled by the state legislature specifically for the Sacramento metropolitan area, the Bay Area, and the South Coast region. AQMDs may be multi-county bodies, although the Sacramento Metropolitan AQMD includes only Sacramento County.
Air Quality Management District. A group of counties or parts of counties that regulate stationary, indirect, and area sources of air pollution within a region. It contains a regional air pollution control board that mostly includes elected officials from within the region.