Port St. Lucie, Fla.
Port St. Lucie, Fla.
Population: 562,135

Three main factors account for South Florida's generally good air quality: Location, geography and meteorology.

Located on a long peninsula jutting out from the mainland, pollutants have to drift a long way to get to Port St. Lucie, according to Patrick Gillespie, a spokesman for the Florida Department of Environmental Protection.

Since there are no valleys or basins in the area, polluted air doesn't get trapped. And the subtropical breezes that blow much of the time keep things circulating. "Bad air doesn't linger," said Gillespie.

The area has also improved air quality by limiting emissions from local power plants, he said. The plants have mostly now switched over to natural gas, with nitrous oxide levels dropping 80% over the past 10 years.

By Les Christie @CNNMoney - Last updated April 26 2012: 11:47 AM ET
Join the Conversation
10 most polluted cities

These 10 cities had the highest levels of year-round pollution, according to the American Lung Association.

Find Homes for sale
  • Property Type
  • Find a home in:
    New York | Atlanta | Chicago | Los Angeles
    Washington D.C | Houston | Philadelphia | More options
Market indexes are shown in real time, except for the DJIA, which is delayed by two minutes. All times are ET. Disclaimer Morningstar: © 2014 Morningstar, Inc. All Rights Reserved. Disclaimer The Dow Jones IndexesSM are proprietary to and distributed by Dow Jones & Company, Inc. and have been licensed for use. All content of the Dow Jones IndexesSM © 2014 is proprietary to Dow Jones & Company, Inc. Chicago Mercantile Association. The market data is the property of Chicago Mercantile Exchange Inc. and its licensors. All rights reserved. FactSet Research Systems Inc. 2014. All rights reserved. Most stock quote data provided by BATS.