The Clean Air Act, like other laws enacted by Congress, was incorporated into the United States Code as Title 42, Chapter 85. The House of Representatives maintains a current version of the U.S. The last major change in the law, the Clean Air Act Amendments of 1990, was enacted by Congress in 1990. Legislation passed since then has made several minor changes. Note: The 1990 Clean Air Act Amendments added a new title IV, relating to acid deposition control, without repealing the existing title IV, relating to noise pollution. Code containing the amended text of the Clean Air Act. The table of contents below gives corresponding section numbers in the Clean Air Act (CAA) and the U.S. EPA’s air research provides the critical science to develop and implement outdoor air regulations under the Clean Air Act and puts new tools and information in the hands of air quality managers and regulators to protect the air we breathe. Airborne lead pollution, a nationwide health concern before EPA phased out lead in motor vehicle gasoline under Clean Air Act authority, now meets national air quality standards except in areas near certain large lead-emitting industrial facilities.

The entire nation meets the carbon monoxide air quality standards, largely because of emissions standards for new motor vehicles under the Clean Air Act. Bottled water is regulated by the Food and Drug Administration and must be as clean and safe as tap water. Access to WASH can impact years of schooling by freeing up time that children spend collecting water to attend school, reducing the prevalence of disease that can keep them out of school, and contributing to a safe and healthy learning environment while at school. EPA in recent years revised standards for five of the six common pollutants subject to national air quality standards. EPA is helping states to meet standards for common pollutants by issuing federal emissions standards for new motor vehicles and non-road engines, national emissions standards for categories of new industrial equipment (e.g., power plants, industrial boilers, cement manufacturing, secondary lead smelting), and technical and policy guidance for state implementation plans. Under the Clean Air Act, EPA continues to work with state, local and tribal governments, other federal agencies, and stakeholders to reduce air pollution and the damage that it causes. For more information on indoor air pollution, which is not regulated under the Clean Air Act, see EPA’s indoor air web site.

4 – Includes organic compounds with more than one benzene ring, and which have a boiling point greater than or equal to 100 ºC. The 1968 Camaro is widely considered to be one of the most iconic muscle cars of all time. Whether they’re shooting the enemy or playing nice with their allies, they’re one of nature’s loudest – and most fascinating – critters. Surfactant alcohol ethoxylates and their derivatives – removed from the list of hazardous air pollutants in August 2000 – Federal Register – August 2, 2000 (65 FR 47342). To implement this action, EPA revised footnote 2 of the list (42 U.S.C. ­The word diesel used to conjure up images of smelly buses and slow-moving trucks, but that picture changed on August 23, 2006, when the JCB DIESELMAX diesel-powered car driven by Andy Green averaged 350 miles per hour over two runs at the Bonneville Salt Flats.

To reflect new scientific studies, EPA revised the national air quality standards for fine particles (2006, 2012), ground-level ozone (2008, 2015), sulfur dioxide (2010), nitrogen dioxide (2010), and lead (2008). After the scientific review, EPA decided to retain the existing standards for carbon monoxide. Although levels of particle pollution and ground-level ozone pollution are substantially lower than in the past, levels are unhealthy in numerous areas of the country. EPA strengthened the air quality standards for ground-level ozone in October 2015 based on extensive scientific evidence about ozone’s effects. EPA in 2014 issued standards commonly known as Tier 3, which consider the vehicle and its fuel as an integrated system, setting new vehicle emissions standards and a new gasoline sulfur standard beginning in 2017. The vehicle emissions standards will reduce both tailpipe and evaporative emissions from passenger cars, light-duty trucks, medium-duty passenger vehicles, and some heavy-duty vehicles. Vehicles and their fuels continue to be an important contributor to air pollution.