Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Radon map for U.S. provided by EPA (EPA, 2009). Yellow areas in low elevation region is the lower radon area while the orange-ish colored area in Texas, in the northwest part of the state is the higher radon area.
Color legend: Dark red = > 4 pCi/L; Orange = Between 2 and 4 pCi/L; Yellow = < 2 pCi/L.
