Fine Particle (PM2.5) Designations
Where You Live
The links on this page will direct you to information about designations recommendations for the fine particle standards for where you live, and will provide information about air quality conditions in your area.
Area Designations for the 1997 Fine Particle (PM2.5) Standards: EPA issued these designations on December 17, 2004 and made modifications in April 2005. They are summarized here.
Area Designations for the 2006 24-Hour Fine Particle (PM2.5) Standards: EPA is in the process of determining compliance with this standard. The status of this effort is summarized here.
Area Designations for the 2012 Annual PM2.5 Standard: EPA will work with states and tribes throughout the initial area designations process. Information on this process is summarized here.
Link to the AIRNow Web site for real-time displays of current ozone and particle pollution.
Webcams - The Effect of Fine Particle Pollution on Visibility Conditions
Link to a number of webcams in urban areas, national parks, and other scenic areas around the country. Fine particles scatter light and are a principle cause of poor visibility conditions.
Air Quality Forecast
Link to the AIRNow Web site for next-day air quality forecasts for hundreds of American cities.