mother and daughter 

Radon Testing

Testing for Radon Is Easy

Testing for radon is a simple, inexpensive precaution everyone should take. Any home in any area can have a radon problem—even apartments—if they are below the third floor.  Millions of people have tested their homes for radon.

Selecting a Test Kit

Do-it-yourself kits allow you to test your home yourself. It is important to select a test kit that has been approved by the National Radon Proficiency Program (NRPP) or the National Radon Safety Board (NRSB). There are two general ways to test for radon. For more information, go to Selecting a Long-term or Short-Term Test in the Citizen's Guide to Radon.

Free Radon Test Kits for EnergySmart Participants

Boulder County Public Health is partnering with the residential EnergySmart program to provide free radon test kits to residents enrolled in the program, which helps residents increase their homes' energy efficiency. Over 500 Boulder County residents have already taken advantage of this opportunity to test their homes. To participate, contact the EnergySmart program at 303-544-1000.

Test Kits for Purchase

Test kits can be purchased through the mail or at local stores. These locations in Boulder County sell short-term test kits:

Center for ReSource Conservation

The ReSource Tool Library
6400 Arapahoe Rd
Boulder, Colorado 80303

Colorado State University Cooperative Extension
Boulder County Extension

9595 Nelson Road
Longmont, Colorado 80501

Conducting the Test

Depending on the type of kit you select, testing for radon can take anywhere from a few days to a year. The longer the test, the more accurate the results are in predicting the year-round radon levels of a home.  For more information, go to Testing Protocols in the Citizen's Guide to Radon.

Test Results

If test results show that your home does have a high level of radon, do not panic. High levels of radon are easily remedied. Needed repairs often cost no more than many other common home repairs and will not change the appearance of your home. A variety of methods can be used. For more information, go to Understanding Your Test Results in the Citizen's Guide to Radon.

For information on reducing your radon level, go to our section on reducing radon in structures.

Learn More

 Related Links


Air Quality Program

Main: 303-441-1564
Submit a question


3450 Broadway
Map & Directions
Hours: 8 a.m.-4:30 p.m. M-F