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The Clean Air Act, which was last amended in 1990, requires EPA to set National Ambient Air Quality Standards (40 CFR part 50) for pollutants considered harmful to public health and the environment. The Clean Air Act identifies two types of national ambient air quality standards.
The Clean Air Act requires EPA to set two types of outdoor air quality standards: primary standards, to protect public health, and secondary standards, to protect the public against adverse environmental effects.
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This interactive tool provides a snapshot – in the form of a map – of current national air quality standards for classical pollutants (particulate matter, nitrogen dioxide, ozone, carbon monoxide and sulphur dioxide) for various averaging times.
Jul 30, 2024 · The Clean Air Act requires EPA to set National Ambient Air Quality Standards (NAAQS) for six principal pollutants, called "criteria pollutants," that are common in outdoor air, considered harmful to public health and the environment, and that come from numerous and diverse sources.
US-EPA has set National Air Quality Standards (NAAQS) for six principal air pollutants: nitrogen oxides (expressed as NO 2), ozone, sulfur dioxide, PM, carbon monoxide (CO), and lead (Pb). Four of these pollutants (CO, Pb, NO, and SO
The AQI is calculated for four major air pollutants regulated by the Clean Air Act: ground-level ozone, particle pollution, carbon monoxide, and sulfur dioxide. For each of these pollutants, EPA has established national air quality standards to protect public health.
Sep 22, 2021 · What are the WHO Global Air Quality Guidelines? What is new in these guidelines? What is air pollution and where are these pollutants found in daily life? How were the recommended AQG levels determined? Why are the AQGs so important for protecting health? How is the burden of poor air quality distributed globally? How can these guidelines be used?
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