The U.S. National Ambient Air Quality Standards (NAAQS, pronounced /ˈnæks/ naks) are limits on atmospheric concentration of six pollutants that cause smog...

accordance with the National Environment Protection (Ambient Air Quality) Measure (NEPM) standards. Each state and territory publishes air quality data for individual...

important, the National Ambient Air Quality Standards program sets standards for concentrations of certain pollutants in outdoor air, and the National Emissions...

in 102 cities that are considered to have air quality worse than the National Ambient Air Quality Standards. There are other initiatives such as a 1,600-kilometre-long...

Agency (EPA). The standards, authorized by the Clean Air Act, are for pollutants not covered by the National Ambient Air Quality Standards (NAAQS) that may...

The first Canadian National Ambient Air Quality Objectives were developed in the mid-1970s. These objectives were set for various air pollutants. The NAAQO...

for compliance purposes for six major pollutants are the National Ambient Air Quality Standards (NAAQS). These are required by law to be reviewed every...

monitoring of air quality. As an example, the United States Environmental Protection Agency has developed the National Ambient Air Quality Standards (NAAQS)...

the National Ambient Air Quality Standards (NAAQS) to establish basic air pollution control requirements across the U.S. The NAAQS sets standards on six...

Ambient air quality criteria, or standards, are concentrations of pollutants in the air, and typically refer to outdoor air. The criteria are specified...