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Ozone acts as a powerful respiratory irritant at the levels frequently found in most of the nation’s urban areas during summer months. Symptoms include shortness of breath, chest pain when inhaling deeply, wheezing, and coughing. A study of a sample of longtime residents of Los Angeles, which has the highest and most frequent ozone problem in the nation, found that the group had a higher-than-expected loss of lung function over time.

RankCity1. Los Angeles-Long Beach-Riverside, Calif. 2.Bakersfield, Calif.3.Visalia-Porterville, Calif.4.Fresno-Madera, Calif.5. Houston-Baytown-Huntsville, Tex.6.Merced, Calif.7.Dallas-Fort Worth, Tex.8.Sacramento–Arden-Arcade–Truckee, Calif.-Nev.9.Baton Rouge-Pierre Part, La.10.New York-Newark-Bridgeport, N.Y- N.J.-Conn.-Pa.11.Washington-Baltimore-Northern Virginia, DC-Md.-Va.-W.Va.12. Philadelphia-Camden-Vineland, Pa.-N.J.-Del.-Md.13.Hanford-Corcoran, Calif.13.Modesto, Calif.15.Phoenix-Mesa-Scottsdale, Ariz.16.Charlotte-Gastonia-Salisbury, N.C.-S.C.17.Las Vegas-Paradise-Pahrump, Nev.17.Milwaukee-Racine-Waukesha, Wis. 19.St. Louis-St. Charles-Farmington, Mo.-Ill.20.El Centro, Calif.20.Kansas City-Overland Park-Kansas City, Mo.-Kans.20.Beaumont-Port Arthur, Tex.20.Chicago-Naperville-Michigan City, Ill.-Ind.-Wis.24.Grand Rapids-Muskegon-Holland, Mich.25.Atlanta-Sandy Springs-Gainesville, GA-Ala.25.Cleveland-Akron-Elyria, OhioSource: State of the Air: 2007, American Lung Association.

Information Please® Database, © 2007 Pearson Education, Inc. All rights reserved.

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America’s 25 Most Ozone-Polluted Metropolitan Areas, 2007

  • America’s 25 Most Ozone-Polluted Metropolitan Areas, 2007

TrendingHere are the facts and trivia that people are buzzing about.

Did Birds Evolve from Dinosaurs?

The Twelve Dancing Princesses

Current Events This Week: January 2023

African Americans by the Numbers

Andersen’s Fairy Tales: Contents

The Celtic Twilight: A Teller of Tales

TrendingHere are the facts and trivia that people are buzzing about.

Did Birds Evolve from Dinosaurs?

The Twelve Dancing Princesses

Current Events This Week: January 2023

African Americans by the Numbers

Andersen’s Fairy Tales: Contents

The Celtic Twilight: A Teller of Tales

  • Did Birds Evolve from Dinosaurs?
  • The Twelve Dancing Princesses
  • Current Events This Week: January 2023
  • African Americans by the Numbers
  • Andersen’s Fairy Tales: Contents
  • The Celtic Twilight: A Teller of Tales