What is Radon and Where Does it Come From?

Radon is a radioactive gas which is odorless, colorless, and tasteless. It occurs in nature and is one environmental hazard which is not man-caused.  Radon comes from the natural breakdown (radioactive decay) of uranium, which can be found in nearly all soils and rocks.  Because radon is a gas, it moves through the ground and may seep into a home through cracks and/or other openings in the floor and foundation.

In outdoor air, radon is diluted to such low concentrations that is usually nothing to worry about.  However, once inside an enclosed space (such as a home) radon can accumulate.  Indoor levels depend both on a building’s construction and the concentration of radon in the underlying soil.  The amount of radon in the air is normally measured in “picocuries per liter of air”, or “pCi/L”.  Radon is found to some degree throughout the United States both outdoors as well as indoors.  The average outdoor level is estimated to be 0.4 pCi/L and the average indoor level is 1.3 pCi/L.  Thus, most people inhale some radon daily as a component of the air they breathe!  For more information about Radon and its risks consult these links.

Training Opportunities

Regional Radon Training Center activities can be viewed at www.engext.ksu.edu/radoncourses.  Information regarding on-line and in-person training courses is provided here by our EPA Region's Training Center Partner, Kansas State University. Training information may also be found on the websites of the two national certification programs that certify professionals to perform measurement and/or mitigation of radon. The programs are the National Radon Proficiency Program and the National Radon Safety Board.

Radon Information Sheet
Radon Testing Checklist
Arkansas Radon Program
Radiation Control4815 W. Markham Street, Slot 30
Little Rock, AR 72205