NAAQS Table | US EPA - U.S. Environmental Protection Agency
2024年2月7日 · The Clean Air Act, which was last amended in 1990, requires EPA to set National Ambient Air Quality Standards (40 CFR part 50) for six principal pollutants ("criteria" air pollutants) which can be harmful to public health and the environment. The Clean Air Act identifies two types of national ambient air quality standards.
Air Pollutants | Air Quality | CDC - Centers for Disease Control …
2024年2月16日 · The EPA regulates six pollutants as “criteria” air pollutants. It regulates them using human health-based and environmentally based criteria. Ground-level ozone and particle pollution are two of these criteria pollutants. The other pollutants are carbon monoxide, lead, nitrogen oxides, and sulfur oxides.
Air quality, energy and health - World Health Organization (WHO)
Pollutants with strong empirical evidence for public health concern include particulate matter (PM), carbon monoxide (CO), ozone (O3), nitrogen dioxide (NO2) and sulphur dioxide (SO2). Health problems can occur as a result of both short- and long-term exposure to these various pollutants.
Reviewing National Ambient Air Quality Standards (NAAQS): …
2024年10月7日 · 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.
Primary Vs. Secondary Pollutants - Air Pollution in California
Primary air pollutants: Pollutants that are formed and emitted directly from particular sources. Examples are particulates, carbon monoxide, nitrogen oxide, and sulfur oxide. Secondary air pollutants: Pollutants that are formed in the lower atmosphere by chemical reactions. The two examples are ozone and secondary organic aerosol (haze).
Managing Air Quality - Air Pollutant Types | US EPA
2024年7月3日 · Describes the types of air pollutants, including common or criteria pollutants, and hazardous air pollutants and links to additional information. Also links to resources on other air pollution issues.
Air pollution | Effects, Causes, Definition, & Facts | Britannica
2024年11月23日 · Air pollution, release into the atmosphere of various gases, finely divided solids, or finely dispersed liquid aerosols at rates that exceed the natural capacity of the environment to dissipate and dilute or absorb them. High concentrations can cause undesirable health, economic, or aesthetic effects.
The Nature of Air Pollution - SpringerLink
5 天之前 · Air pollution has wide-ranging impacts on human health, ecosystems, and the environment: Health Impacts: Exposure to air pollutants can lead to a range of health problems, including respiratory and cardiovascular diseases, asthma, bronchitis, heart attacks, strokes, and even premature death (Fig. 5.6) (Andersen et al., 2011).Vulnerable populations, such as children, the elderly, and ...
Air Resource Management Program - Air Pollutants - US Forest …
Ozone close to the Earth’s surface is an air pollutant. It is formed by chemical reactions between volatile organic compounds and oxides of nitrogen in the presence of sunlight and, often, elevated temperatures. Industrial and automobile emissions are the primary human sources of volatile organic compounds and nitrogen oxides.
The six criteria air pollutants | Description, List, Health Effects ...
Focusing on six “criteria” air pollutants—sulfur dioxide, nitrogen dioxide, particulate matter, carbon monoxide, ozone, and lead—the resultant National Ambient Air Quality Standards became the centerpiece of air pollution regulations and required that all U.S. states, cities, and towns maintain levels of these pollutants beneath the ...