There have been several amendments made to The Air Pollution Act of 1955. The first amendment came in 1960, which extended research funding for four years. The next amendment came in 1962 and basically enforced the principle provisions of the original act. In addition, this amendment also called for research to be done by the
Surgeon General. In 1967, the Air Quality Act of 1967 was passed. In 1967, the Air Quality Act was enacted in order to expand federal government activities. In accordance with this law, enforcement proceedings were initiated in areas subject to interstate air pollution transport. This amendment allowed states to enact federal automobile emissions standards. Senator Edmond Muskie (D-Maine) said that this was the “first comprehensive federal air pollution control.” The
National Air Pollution Control Administration then provided technical information to the states, which the states used to develop air quality standards. The NAPCA then had the power to veto any of the states' proposed emission standards. This amendment was not as effective as it was initially thought to be, with only 36 air regions designated, and as well as no states having fully developed pollution control programs. In 1969, another amendment was made to the act. This amendment further expanded the research on low emissions, fuels, and automobiles. In addition, the 1970 amendments required various states to submit state implementation plans for attaining and maintaining the National Ambient Air Quality Standards and required the use of air monitoring to determine if implementation plans were successful. National technology-forcing emissions standards were also set for new automobiles. This amendment allowed citizens the ability to sue polluters or government agencies for failure to abide by the act. Finally, the amendment required that by 1975, the entire United States would attain clean air status. 1990 was the most recent amendments to the act under President
George H. W. Bush. The 1990 amendments granted significantly more authority to the federal government than any prior air quality legislation. Nine subjects were identified in this amendment, with smog,
acid rain, motor vehicle emissions, and toxic air pollution among them. Five severity classifications were identified to measure smog. To better control acid rain, new regulatory programs were created. New and stricter emission standards were created for motor vehicles beginning with the 1995 model year. The National Emission Standards for Hazardous Air Pollutants program was created to expand much broader industries and activities. ==National Air Pollution Symposium==