Los Angeles ? Los Angeles can continue being the butt of smog jokes now that it has once again topped the American Lung Association’s bad air list of most polluted cities in America.

The association found that the Los Angeles metropolitan area, which includes Long Beach and Riverside counties, had the worst air based on 2003 through 2005 figures.

The Pittsburgh area was ranked as the nation’s second most polluted metropolitan area followed by Bakersfield, Calif., Birmingham, Ala., Detroit and Cleveland. Visalia, Calif., Cincinnati, Indianapolis and St. Louis rounded out the top 10.

The news wasn’t all bad for Los Angeles. Despite the dubious distinction, the number of days residents breathed the nation’s worst ozone levels was fewer than in previous years.