What Do Your Radon Test Results Mean

You will get a radon test result report after you send your test kits in for analysis. The radon test results will be reported in units called picocuries per liter (pCi/l) if you live in the USA. Radon test results reports going outside the USA will be reported in Becquerels per cubic meter (Bq/m3).

US EPA says you should fix your home if your long term radon test results are 4 pCi/l or more. If your radon test results are over 2 pCi/l, EPA says you should still consider fixing your home. Regardless of your radon test results, you should try to reduce your exposure to any radiation (radon or otherwise) whenever possible.

When interpreting your radon test results, you need to remember that short-term radon test results are not as accurate as long-term radon test results. This can happen when your short-term radon test results are close to 4 pCi/l. For example, if the average of your short-term radon test results is 4.1 pCi/l, then there is about a 50% chance that your year-round (long-term) radon test results would be somewhat below 4 pCi/l. However, most experts agree that any radon exposure carries some risk. There is no such thing as a "safe" radon level. The lower you can get your radon test result, the lower your risk of getting lung cancer.

You also need to consider how much time you spend in different areas of your home when interpreting your radon test results. For instance, if your basement radon test result is 5 pCi/l and you spend an average of 1 hour a day in the basement then your daily exposure would be 5 pCi/l-hours (5 pCi/l x 1 hr. = 5). If your child's bedroom has a radon test result of 1 pCi/l and they spend 8 hours a day in that room then their radon exposure would be 8 pCi/l-hours (1 pCi/l x 8 hrs = 8). So even though your radon test result is higher in the basement, the actual radon health risk is higher in the child's bedroom because more time is spent there. Clearly you need to test all of the key living areas in your home if you want to fully understand the health risk associated with your radon test results.

To get more help choosing the right radon test kits for your home use our Radon Testing Wizard . Or if you know which test you need you can go directly to the order page.



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