Realty Trac's second annual Manmade Environmental Hazards Risk Report finds 25 million U.S. homes are in zip codes that are at high risk or very high risk for manmade environmental hazards - 38% of the 64 million homes that were analyzed.

However, most sections of Florida fall into very-low, low or medium category for risk based on the prevalence of five manmade environmental hazards: air quality, superfund sites, polluters, brownfields and former drug labs.

Of the high12 major U.S. markets cited by Realty Trac with "no high-risk zip codes" Cape Coral-Ft Myers and Naples made the list. Across the country, home prices in high risk zip codes were lower on average, an appreciation over the last 10 years slower when compared to low risk zip codes. Tom: The great reasons to live in SWFL just keep coming.