Skip to content

    Asthma Health Center

    Font Size

    Cleanest Air: Cheyenne, Wyo. Worst Air: L.A.

    Annual State of Air Report Says Half of U.S. Cities Have Air Pollution
    WebMD Health News

    April 29, 2005 -- America's air quality is a little bit better. But don't breathe a big sigh of relief -- especially if you're among the 52% of American's whose air is still unhealthy.

    The American Lung Association today released its annual State of the Air report, using data collected from 2001-2003. The news is a little better than last year. There was less of the worst kind of air pollution -- small particle pollution -- thanks in part to curbs on coal-fired power plants.

    These efforts -- and a cooler, wetter summer in some parts of the nation -- helped reduce ozone levels, too. Ozone is the main ingredient in smog.

    That's good news. But not good enough, says ALA president John L. Kirkwood.

    "Dirty air threatens the lives and health of far too many Americans," Kirkwood says in a news release.

    Why is Kirkwood so grumpy? The ALA report shows that:

    • 52% of Americans live in counties with unhealthy levels of either ozone or particle pollution.
    • 49% of Americans live in areas with unhealthy ozone levels.
    • 1 in 5 Americans live in areas with unhealthy year-round levels of particle pollution.
    • 17% of Americans -- more than 50 million people -- live in the 47 counties that have unhealthy levels of ozone, year-round particle pollution, and short-term bursts of particle pollution.

    Most at risk from bad air:

    Worst Air/Best Air Quality

    Keeping its reputation for terrible air quality, Los Angeles once again tops the list of metropolitan areas with the worst long-term particle pollution -- the most dangerous kind of air pollution.

    The worst 25 metropolitan areas for year-round particle pollution (cities with the same rank are tied):

    1. Los Angeles-Long Beach-Riverside, Calif.
    2. Bakersfield, Calif.
    3. Visalia-Porterville, Calif.
    4. Pittsburgh-New Castle, Pa.
    5. Fresno-Madera, Calif.
    6. Detroit-Warren-Flint, Mich.
    7. Hanford-Corcoran, Calif.
    8. Cleveland-Akron-Elyria, Ohio
    9. Atlanta-Sandy Springs-Gainesville, Ga.
    10. Weirton-Steubenville, W.V.-Ohio
    10. Cincinnati-Middletown-Wilmington, Ohio-Ky.-Ind.
    12. New York-Newark-Bridgeport, N.Y.-N.J.-Conn.
    12. Chicago-Naperville-Michigan City, Ill.-Ind.-Wis.
    14. St. Louis-St. Charles-Farmington, Mo.-Ill.
    15. Canton-Massillon, Ohio
    15. Birmingham-Hoover-Cullman, Ala.
    17. Charleston, W.V.
    18. York-Hanover-Gettysburg, Pa.
    18. Merced, Calif.
    18. Lancaster, Pa.
    21. Louisville-Elizabethtown-Scottsburg, Ky.-Ind.
    22. Indianapolis-Anderson-Columbus, Ind.
    22. Columbus-Marion-Chillicothe, Ohio
    24. Washington-Baltimore-Northern Virginia, D.C.-Md.-Va.
    24. Huntington-Ashland, W.V.-Ky.-Ohio

    When Is Your Asthma Worse?

    When Is Your Asthma Worse?

    Take the WebMD Asthma assessment to get Personalized Action Plan

    Start Now

    Today on WebMD

    Lung and bronchial tube graphic
    5 common triggers.
    group jogging in park
    Should you avoid fitness activities?
    asthma inhaler
    Learn about your options.
    man feeling faint
    What’s the difference?
    Madison Wisconsin Capitol
    woman wearing cpap mask
    red wine pouring into glass
    Woman holding inhaler
    Man outdoors coughing
    Lung and bronchial tube graphic
    10 Worst Asthma Cities