The 50 Most Radioactive Cities in America

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Even though Jacksonville is America's Most Radioactive City, it's no Chernobyl. If you're a resident, you don't have to convert your in-ground pool into a fallout shelter. What you should do, however, is limit your exposure to the radiation sources we used in our tabulations—sources such as radon (EPA), x-rays (SimplyMap), cigarette smoke (CDC), and UV rays (NOAA ).

We also considered exposure to cosmic radiation due to elevation (USGS), the number of coal and nuclear power plants within 50 miles (Department of Energy), and death rates from cancers commonly caused by radiation (CDC).

http://health.msn.com/health-topics/cancer/articlepage.aspx?cp-documentid=100271966&GT1=31025

 

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http://www.coj.net/Departments/Plan.../Building-Inspection-Division/radon_area.aspx

The area surrounded by the following roads shall be considered the Passive Radon Area Limits:

Starting at the intersection of J. Turner Butler Boulevard and Kernan Boulevard, proceed north on Kernan Boulevard to McCormick Road; proceed west on McCormick Road to Monument Road; proceed west on Monument Road to the intersection of Monument Road, Atlantic Boulevard, and Live Oak Drive; proceed south on Live Oak Drive to Forest Boulevard; proceed south on Forest Boulevard to Forest Boulevard South; proceed directly south from this point along the JEA easement to Gate Parkway North; proceed east along Gate Parkway North to J. Turner Butler Boulevard; proceed east on J. Turner Butler Boulevard to Kernan Boulevard.

All residential new construction performed in the Passive Radon Area Limits shall comply with Appendix B, Florida Standard for Passive Radon-Resistant New Residential Building Construction, of the Florida Building Code.