What are air quality designations?
The six pollutants are carbon monoxide, lead, ground-level ozone, nitrogen dioxide, particulate matter, and sulfur dioxide.
What do the initials NAAQS mean?
The Clean Air Act requires U.S. EPA to set National Ambient Air Quality Standards (NAAQS) for pollutants that are considered harmful to the public and environment. These pollutants come from numerous and diverse sources.
How are NAAQS determined?
NAAQS are selected by the U.S. EPA Administrator at the conclusion of a public process that takes about five years for completion. The process starts with a comprehensive review of the relevant scientific literature.
What are the six pollutants considered part of the NAAQS?
NAAQS are currently set for carbon monoxide, lead, ground-level ozone, nitrogen dioxide, particulate matter, and sulfur dioxide.
Are there air quality standards?
National Ambient Air Quality Standards (NAAQS), in the United States, allowable levels of harmful pollutants set by the Environmental Protection Agency (EPA) in accordance with the Clean Air Act (CAA). The CAA established two types of standards for ambient air quality.
What is an EPA attainment area?
If the air quality in a geographic area meets or is cleaner than the national standard, it is called an attainment area (designated “attainment/unclassifiable”); areas that don’t meet the national standard are called nonattainment areas.
What does the NAAQS do?
The U.S. National Ambient Air Quality Standards (NAAQS, pronounced /ˈnæks/ naks) are limits on atmospheric concentration of six pollutants that cause smog, acid rain, and other health hazards. Established by the United States Environmental Protection Agency (EPA) under authority of the Clean Air Act (42 U.S.C.
What is a NAAQS maintenance area?
A: Nonattainment and maintenance areas are geographic areas that require specific air pollution controls, analysis, programs, etc. A nonattainment area is an area that does not meet the NAAQS. A maintenance area was formerly in nonattainment and currently under a maintenance plan.
What regulates NAAQS?
What is NAAQS EPA?
When EPA establishes a new national ambient air quality standard (NAAQS) or revises an existing standard for a criteria air pollutant, it sets in motion a series of actions aimed at ensuring that air quality throughout the country meets those standards.
What is Naaqs EPA?
Which of the following are the major objectives of Naaqs?
To indicate necessary air quality levels and appropriate margins required to ensure the protection of vegetation, health and property.