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The six criteria air pollutants were the first set of pollutants recognized by the United States Environmental Protection Agency as needing standards on a national level. [5] The Clean Air Act requires the EPA to set US National Ambient Air Quality Standards (NAAQS) for the six CAPs. [ 6 ]
EPA that GHGs are air pollutants covered by the Clean Air Act. The EPA may regulate GHGs if they are determined to be a danger to human health. Supreme Court Case: May 2007 President George W. Bush orders EPA to use its authority under the Clean Air Act to regulate GHGs from mobile sources, working in coordination with several other federal ...
The criteria pollutants and their respective limits are defined in the National Ambient Air Quality Standards, which were a part of the Clean Air Act Amendments of 1970 (P.L. 91-604, Sec. 109). The EPA has regulated each criteria pollutant through two different standards, primary and secondary. [ 2 ]
The AQI is based on the five "criteria" pollutants regulated under the Clean Air Act: ground-level ozone, particulate matter, carbon monoxide, sulfur dioxide, and nitrogen dioxide. The EPA has established National Ambient Air Quality Standards (NAAQS) for each of these pollutants in order to protect public health.
The law was initially enacted as the Air Pollution Control Act of 1955. Amendments in 1967 and 1970 (the framework for today's U.S. Clean Air Act) imposed national air quality requirements, and placed administrative responsibility with the newly created Environmental Protection Agency. Major amendments followed in 1977 and 1990.
Toxic Substances and Hazardous and Nuclear Waste Control Act of 1990; Philippine Mining Act of 1995; Animal Welfare Act of 1998; Philippine Fisheries Code of 1998; Clean Air Act of 1999; Philippine Ecological Waste and Solid Management Act of 2000; Wildlife Resources Conservation and Protection Act of 2001; Chain Saw Act of 2002
Clean Air Act standards. Under the Clean Air Act , the National Ambient Air Quality Standards (NAAQS) are developed by the Environmental Protection Agency (EPA) for six common air pollutants, also called "criteria pollutants": particulates ; smog and ground-level ozone ; carbon monoxide ; sulfur oxides ; nitrogen oxides ; and lead . [ 8 ]
Ambient air quality criteria, or standards, are concentrations of pollutants in the air, and typically refer to outdoor air.The criteria are specified for a variety of reasons including for the protection of human health, buildings, crops, vegetation, ecosystems, as well as for planning and other purposes.