An area with air quality that meets or exceeds the U. S. Environmental Protection Agency (EPA) health standards as stated in the Clean Air Act. Nonattainment areas are areas considered not to have met these standards for designated pollutants. An area may be an attainment area for one pollutant and a nonattainment area for others.
An area considered to have air quality as good as, or better than, the National Ambient Air Quality Standards (NAAQS) as defined in the Clean Air Act. An area may be in attainment for one or more polutants but be in nonattainment for one or more other pollutants.
A geographical area, such as a city, state, or regional airshed, that is meeting EPA clean air standards.
An area determined to have met federal or State air quality standards, as defined in the federal Clean Air Act or the California Clean Air Act. An area may be an attainment area for one pollutant and a non-attainment area for others.
A region or area that meets the National Ambient Air Quality Standards (NAAQS) set by EPA.
A geographic area in which levels of a criteria air pollutant meet or are better than the health-based primary standard (National Ambient Air Quality Standard, or NAAQS). A single area could be designated attainment for one pollutant and nonattainment for another.
An area considered to have air quality that meets or exceeds the U.S. Environmental Protection Agency (EPA) health standards used in the Clean Air Act. An area may be an attainment area for one pollutant and a non-attainment area for others.
An area whose boundaries are determined jointly by a state and US Environmental Protection Agency that meets the national ambient air quality standards (NAAQS) established by EPA under the Clean Air Act. An area may be an attainment area for certain pollutants and a nonattainment area for others. Attainment areas generally have less stringent regulatory standards than nonattainment areas.
An area that meets the air quality standard for a criteria pollutant (under NAAQS).
A geographic area which is in compliance with the National and/or California Ambient Air Quality Standards (NAAQS OR CAAQS).
An area considered to have air quality as good as or better than what the federal government has set as the acceptable level of a pollutant in the air (acceptable levels are called ambient air quality standards as defined in the Clean Air Act).
A geographic area that meets the National Ambient Air Quality Standard (NAAQS) is called an attainment area. An area with too much of a pollutant to meet the NAAQS for that pollutant is called a nonattainment area. NAAQSs are concentration levels for each of six criteria air pollutants, above which adverse effects on human health may occur. The six criteria pollutants are used as indicators of air quality. more
a geographic area in which levels of a criteria air pollutant meet the health-based National Ambient Air Quality Standard (NAAQS) for that specific pollutant. bioaccumulate: certain metals and organic pollutants tend to bioaccumulate, meaning they accumulate in muscle or fatty tissue of organisms and dramatically increase in concentration as they move up the food chain.
An area considered to have air quality as good as or better than the National Ambient Air Quality Standards as defined by the Clean Air Act. An area may an attainment area for one pollutant and a non-attainment area for another pollutant.
A geographic area in which levels of a criteria air pollutant meet the health-based primary standard (national ambient air quality standard, or NAAQS) for the pollutant. An area may have on acceptable level for one criteria air pollutant, but may have unacceptable levels for others. Thus, an area could be both attainment and nonattainment at the same time. Attainment areas are defined using federal pollutant limits set by regulatory agencies.
An attainment area is a zone within which the the level of a pollutant is considered to meet National Ambient Air Quality Standards. These standards are per pollutant, so it is possible for a zone to meet these standards for a certain substance and not for another.
