Carbon Monoxide (CO)

A colorless, odorless, tasteless gas that impedes the oxygenation of blood. CO is formed in large part by incomplete combustion of fuel.Clean Air Act Amendments (CAAA)The 1990 Clean Air Act is a piece of United States environmental policy relating to the reduction of...

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.