| National Ambient Air Quality Standards |
Article Index for National |
Website Links For National |
Information AboutNational Ambient Air Quality Standards |
| CATEGORIES ABOUT NATIONAL AMBIENT AIR QUALITY STANDARDS | |
| toxicology | |
| united states environmental protection agency | |
| pollution in the united states | |
| air dispersion modeling | |
|
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 Facade s, visibility, Crops , and Domestic Animal s). NAAQS requires the EPA to set standards on six Criteria Air Contaminants : # Ozone (O3) # Particulate Matter
# Carbon Monoxide (CO) # Sulfur Dioxide (SO2) # Nitrogen Oxide s (NOx) # Lead (Pb) STANDARDS Each standard has its own criteria for how many times it may be exceeded, in some cases using a three year average. As of June 15, 2005, the 1-hour ozone standard no longer applies to areas designated with respect to the 8-hour ozone standard (which includes most of the United States, except for portions of 10 states). Source: USEPA SEE ALSO
EXTERNAL LINKS
|
|
|