Definitions for "National Ambient Air Quality Standards"
Related Terms:
Naaqs, Criteria pollutant, Criteria air pollutants, Aqi, Air quality index, Criteria pollutants, Hazardous air pollutant, Air pollution, Clean air act amendments of 1990, Air quality standards, Attainment area, Hazardous air pollutants, Primary pollutant, Air toxics, Neshap, Nonattainment area, Caa, Non-attainment area, Major source, Primary standards, Prevention of significant deterioration, Caaa, Clean air act, Air quality, Indoor air pollution, Smog, Air pollutant, Photochemical smog, Tac , Secondary pollutant, Cap , Smcl, State implementation plan, Maximum contaminant levels, Emission standards, Maximum contaminant level, Mcl , Pollutant, Ipc, Pollutants, Pollution, Emission standard, Immission, Secondary standard, Remediation, Maximum contaminant level goal, Mclg, Area source, Point sources
Federal standards that set allowable concentrations and exposure limits for various pollutants. The EPA developed the standards in response to a requirement of the CAA.
Nationwide air quality standards established by the U.S. Environmental Protection Agency (EPA) that apply to air outside buildings.
The Federal Clean Air Act of 1970, amended in 1977 and 1990, required the Environmental Protection Agency (EPA) to establish National Ambient Air Quality Standards. EPA has set specific standards for each of six major pollutants: carbon monoxide, lead, nitrogen dioxide, ozone, sulfur dioxide, and particulate matter whose aerodynamic size is equal to or less than 10 microns (PM-10). Each pollutant standard represents a maximum concentration level (micrograms per cubic meter) that cannot be exceeded during a specified time interval. A county meets the national ambient air quality standards if none of the six pollutants exceed the standard during a 12-month period.
Under the Clean Air Act, the Environmental Protection Agency is required to set uniform national ambient air quality standards, or NAAQS, for certain specified air pollutants that are dangerous to public health or welfare. For example, EPA has specified that ambient air should contain no more than a given concentration of carbon monoxide. To implement this standard, the states must prepare a State Implementation Plan (SIP) that details the steps they will take to ensure that air quality meets the federal NAAQS.
Standards that EPA sets under the Clean Air Act to protect public health with an adequate margin of safety (primary standards) and to protect the environment (secondary standards). These standards apply to sources that emit pollutants into the atmosphere. Also see "Clean Air Act."
Ambient standards for air pollutants specifically regulated under the CAA. These pollutants include ozone, CO, nitrogen dioxide (a form of nitrogen oxides), lead, particulate matter and sulfer dioxide (SO2).
Standards established by the EPA that apply to outdoor air throughout the country.
Levels of pollutants that cannot be exceeded. These levels are prescribed by law or regulation for outside air. Nitrogen Dioxide (NO2) The result of nitric oxide combing with oxygen in the atmosphere. It is a major component of ozone.
health-based pollutant concentration limits established by EPA that apply to outside air (see Criteria Pollutants)
Ambient standards for six pollutants including ozone, carbon monoxide, nitrogen dioxide, lead, particulate matter, and oxides of sulfur specifically regulated under the U.S. Clean Air Act of 1990. Urban areas are required to achieve attainment in regards to ambient concentrations of these criteria pollutants.
Ambient standards for criteria air pollutants specifically regulated under the CAAA. These pollutants include ozone,CO,NO2, lead, particulate matter and SOx.
Minimum standards set by EPA developed for criteria air pollutants that must be met everywhere in the country.
Standards for maximum allowable concentration of seven air pollutants in ambient air set by US Environmental Protection Agency to protect public health with an adequate margin of safety (primary standards) and to protect the environment (secondary standards). The seven pollutants are ozone, nitrogen oxides (NOx), sulfur dioxide (SO2), particulate matter (PM), fine particulate matter (PM 2.5), carbon monoxide (CO), and lead.
Ambient standards for criteria air pollutants specifically regulated under the CAA. These pollutants include ozone, CO, NO 2 , lead, particulate matter and SO x.
Standards established by EPA for maximum allowable concentrations of six "criteria" pollutants in outdoor air. The six pollutants are carbon monoxide, lead, ground-level ozone, nitrogen dioxide, particulate matter, and sulfur dioxide. The standards are set at a level that protects public health with an adequate margin of safety.
Standards established by the U.S. Environmental Protection Agency used for protecting and improving air quality.
Standards established by EPA that apply for outside air throughout the country.
Compare? Maximum air pollutant standards that EPA set under the Clean Air Act for attainment by each state. The standards were to be achieved by 1975, along with state implementation plans to control industrial sources in each state.
Standards established by EPA to protect human health and the environment from criteria pollutants, which apply for outside air throughout the nation.
A legal limit on the level of atmospheric contamination. The level is established as the concentration limits needed to protect all of the public against adverse effects on public health and welfare, with an adequate safety margin. Primary standards are those related to health effects. Secondary standards are designed to protect the public welfare from effects such as visibility reduction, soiling, material damage and nuisances.
Maximum allowable concentrations of pollutants that EPA may reasonably anticipate pose a danger to public health or welfare. When violated, the standards cause an area to be designated a nonattainment area.
National standards set by the Environmental Protection Agency under authority of the Clean Air Act; NAAQS define the maximum allowable concentrations of specified air pollutants in outdoor (ambient) air. NAAQS have been set for carbon monoxide, particulate matter, sulfur oxides, nitrogen dioxide, lead, and ozone. "Primary" NAAQS protect human health, with a margin of safety; "secondary" NAAQS protect human welfare, which includes effects on soils, water, crops, vegetation, materials, etc.
A level of air quality set by the EPA intended to protect human health and public welfare. Standards have been set for six "criteria" pollutants: carbon monoxide, lead, nitrogen dioxide, particulate matter, ozone, and sulfur oxides.
standards set by the EPA for pollutants considered harmful to public health and environment. The Clean Air Act established two types of air quality standards: primary and secondary standards. Primary standards set limits to protect public health, including the health of “sensitive” populations such as asthmatics, children, and the elderly. Secondary standards set limits to protect the public welfare, including protection against decreased visibility and damage to animals, crops, vegetation, and buildings.
Standards set by the U.S. Environmental Protection Agency, under the auspices of the Clean Air Act, for six pollutants — ozone, carbon monoxide, total suspended particulates, sulfur dioxide, lead, and nitrogen oxides — that apply to outdoor air throughout the country.
These standards apply to pollutants considered harmful to public health and the environment.
In the United States, national standards for the ambient concentrations in air of different air pollutants designed to protect human health and welfare.
The allowable concentrations of air pollutants in the air specified by the Federal government. The air quality standards are divided into primary standards (based on the air quality criteria and allowing an adequate margin of safety and requisite to protect the public health) and secondary standards (based on the air quality criteria and allowing an adequate margin of safety and requisite to protect the public welfare from any unknown or expected adverse effects of air pollutants).
Standards set by the federal EPA for the maximum levels of air pollutants which can exist in the outdoor air without unacceptable effects on human health or the public welfare.
(Abbreviated NAAQS.) Air quality standards regarding air pollution for the United States that are required to be met by industry and are enforceable by law. See emission standard.
The National Ambient Air Quality Standards (NAAQS) are standards established by the United States Environmental Protection Agency that apply for outdoor air throughout the country. Primary standards are designed to protect human health, including sensitive populations such as children, the elderly, and individuals suffering from respiratory disease. Secondary standards are designed to protect public welfare (e.g. building facades, visibility, crops, and domestic animals).