According to Denver ABC Channel 7 news, every single county in Colorado is at high risk for high level radon gas inside th home. This is mainly because the uranium that it takes to create radon is all throughout Colorado. Radon is actually created by the decay of uranium, it is a byproduct of the decaying process. Radon seeps into your home through cracks and entries in the foundation or around the foundation of the home.
According to this article and several others from the State of Colorado and the EPA, the only way to know the level of radon in your home is to test for it. There is a short test and a long test that will give you results for radon levels in your home.
Every January is radon test month in Colorado, it is really a fantastic time to test as all the doors and windows in the home are typically closed. The State has an entire section dedicated to radon informaton and radon testing. Continous testing is the only safe way to know your radon levels.
Even with the high degree of education in Colorado on radon, the Colorado Department of Public Health and Environment states that only 34% of the 73% percent of Coloradoans that know about radon actually tested their homes for the gas. With so many educated residents it does not make sense that 50% of Colorado homes have radon level above the recommended action limit according to the Environmental Protection Agency of 4.0 pCi/L (picocuries per liter of air).
According to other sources in El Paso County, "Nearly 50 percent of the homes that have been tested are high levels of radon," said Gonzales a deputy of director of El Paso County Public Health. With as common as radon is in Colorado, many counties will have free radon testing kits that they will give away in Radon Awareness Month (January of every year).