National ambient air quality standards (NAAQS) criteria
HERO ID
644585
Reference Type
Technical Report
Subtype
EPA Report
Year
2010
Language
English
| HERO ID | 644585 |
|---|---|
| Material Type | EPA Report |
| Year | 2010 |
| Title | National ambient air quality standards (NAAQS) criteria |
| Authoring Organization | U.S. Environmental Protection Agency |
| Publisher Text | U.S. Environmental Protection Agency |
| City | Washington, DC |
| Abstract | The Clean Air Act, which was last amended in 1990, requires EPA to set National Ambient Air Quality Standards (40 CFR part 50) for pollutants considered harmful to public health and the environment. The Clean Air Act established two types of national air quality 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 public welfare, including protection against decreased visibility, damage to animals, crops, vegetation, and buildings. The EPA Office of Air Quality Planning and Standards (OAQPS) has set National Ambient Air Quality Standards for six principal pollutants, which are called "criteria" pollutants. They are listed below. Units of measure for the standards are parts per million (ppm) by volume, parts per billion (ppb - 1 part in 1,000,000,000) by volume, milligrams per cubic meter of air (mg/m3), and micrograms per cubic meter of air (µg/m3). |
| Url | http://www.epa.gov/air/criteria.html |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |