AIR. The Clean Air Act and Controlling Air Pollution. History of Legislation. Original CAA of 1955 predates the EPA by 15 years It authorized technical and financial assistance to states Amendments were made in the 60’s, in 1970, 1977, and most recently in 1990. 1960’s Amendments.
The Clean Air Act and Controlling Air Pollution
The EPA oversees the individual states’ plans and will take over enforcement if the state’s plan is unacceptable