A geographic region where the concentration of a specific air pollutant does not exceed federal standards. ... (05 Dec 1998) ...
Found on
http://www.encyclo.co.uk/local/20973
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 sa...
Found on
http://www.encyclo.co.uk/local/21292
An area considered to have air quality as good as or better than the National Ambient Air Quality St
Found on
http://www.encyclo.co.uk/local/22399
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.
Found on
https://www.encyclo.co.uk/local/20094
No exact match found.
