What Are the Average Radon Levels in Colorado Mountain Homes?

Colorado's mountain communities are known for breathtaking scenery, outdoor recreation, and high-quality living. However, homeowners in these areas should also be aware of a less visible concern: radon gas. Many people are surprised to learn that Colorado consistently ranks among the states with the highest indoor radon levels in the nation.

Radon is a naturally occurring radioactive gas created by the breakdown of uranium in soil and rock. Because it is odorless, colorless, and tasteless, radon can accumulate inside homes without any obvious warning signs. Long-term exposure to elevated radon levels is a leading cause of lung cancer among non-smokers.

So, what are the average radon levels in Colorado mountain homes? While levels vary from property to property, many homes in mountain regions such as Eagle County, Summit County, Garfield County, and Pitkin County test above the Environmental Protection Agency's action level of 4.0 picocuries per liter (pCi/L). Some homes record readings two, three, or even five times higher than the EPA recommendation.

Several factors contribute to elevated radon levels in mountain communities. Colorado's geology contains uranium-bearing rock formations that naturally release radon gas. In addition, homes built into hillsides, homes with basements, and tightly sealed energy-efficient construction can create conditions that allow radon to accumulate indoors.

It's important to understand that average county or regional radon levels cannot predict the level in an individual home. Two neighboring properties may have dramatically different readings due to differences in soil composition, foundation design, and ventilation.

The only way to know your home's radon level is to test it. Fortunately, testing is inexpensive and easy to perform. If elevated levels are found, modern mitigation systems can significantly reduce radon concentrations and improve indoor air quality.

For Colorado mountain homeowners, regular radon testing is one of the simplest and most effective ways to protect your family's long-term health.