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BACT

Acronym for Best Available Technology.

Build/No-Build

Conformity requirement that Metropolitan Planning Organizations must show that “building” or implementing a long-range plan or Transportation Improvement Program will provide more emissions reductions that “not building” or not implementing...

Attainment Area

An area with air quality that meets or exceeds the U.S. Environmental Protection Agency (EPA) health standards used in the Clean Air Act. An area may be an attainment area for one pollutant and a non-attainment area for others. Non-attainment areas are those that have...

AQS

Acronym for EPA’s Air Quality System – the system records air quality data and makes it available for public review.

Area Source

A collection of similar seemingly small sources of pollution from throughout the non-attainment area. Examples include lawn mowers, barbecue grills, and fireplaces.