Ambient air quality standards

Ambient Air Quality Standards
(See Criteria Pollutants and National Ambient Air Quality Standards.)
Source: Terms of the Environment ...

Ambient Air Quality Standards (AAQS): Health- and welfare-based standards for outdoor air which identify the maximum acceptable average concentrations of air pollutants during a specified period of time.

Ambient Air Quality Standards: See Criteria Pollutants and National Ambient Air Quality Standards.

National ambient air quality standards designed to protect welfare, including effects on soils, water, crops, vegetation, man-made (anthropogenic) materials, animals, wildlife, weather, visibility, and climate; damage to property; ...

National Ambient Air Quality Standards
Standards established by EPA that apply for outdoor air throughout the country.
National Emissions Standards for Hazardous Air Pollutants ...

National ambient air quality standards Federal standards for the minimum ambient air quality needed to protect public health and welfare.
Nitrogen oxides All oxides of nitrogen except nitrous oxide.

National Ambient Air Quality Standards (NAAQS) - Sets the levels of air quality for the United States , in the Code of Federal Regulations (40 CFR ß50.2), to protect the population's health.

National Ambient Air Quality Standards (NAAQS) - health-based pollutant concentration limits established by EPA that apply to outside air (see Criteria Pollutants) ...

example, EPA will seek to require potentially responsible parties to clean up a Superfund site, or pay for the cleanup, whereas under the Clean Air Act the agency may invoke sanctions against the cities failing to meet ambient air quality standards ...

National Ambient Air Quality Standards or NAAQS Under the US Clean Air Act, the Environmental Protection Agency (EPA) must establish National Ambient Air Quality Standards to identify pollutants that can harm human health and the environment.

Criteria Pollutants: The 1970 amendments to the Clean Air Act required EPA to set National Ambient Air Quality Standards for certain pollutants known to be hazardous to human health.

Secondary Standards: National ambient air quality standards designed to protect welfare, including effects on soils, water, crops, vegetation, man-made (anthropogenic) materials, animals, wildlife, weather, visibility, and climate; ...

Hazardous Air Pollutants - Air pollutants which are not covered by ambient air quality standards but which, as defined in the Clean Air Act, may reasonably be expected to cause or contribute to irreversible illness or death.

primary standards National ambient air quality standards designed to protect human health with "an adequate margin for safety. See National Ambient Air Quality Standards, secondary standards.
primary treatment See primary waste treatment.

Attainment Area- An area considered to have air quality as good as or better than the national ambient air quality standards as defined in the Clean Air Act. An area may be an attainment area for one pollutant and a non-attainment area for others.

Air pollutants which are not covered by ambient air quality standards but which, as defined in the Clean Air Act, may reasonably be expected to cause or contribute to irreversible illness or death.

171 percent, energy consumption rose 47 percent, and population increased 40 percent. Despite this progress, in 2002, 146 million people lived in U.S. counties with pollution levels above at least one of the National Ambient Air Quality Standards.

See also: Ambient air, Air quality, Standards, Air quality standards, Air