Radon Testing

radon tests kit

How to perform a radon test

MDH recommends that all Minnesota homeowners test their homes for radon. A radon test is the only way to find out how much radon is in your home and if you and your family are at risk. Performing a radon test on your own is easy, inexpensive and takes only a few minutes of your time.

The results of a properly performed radon test will help you determine if you need to take further action to protect yourself from the health risks of radon.

There are two general ways to test for Radon


Short-term tests measure radon levels for 2 to 7 days, or use a continuous monitor for a minimum of 48 hours, depending on the device. While short-term tests do not measure the annual average level of radon, they do offer a quick and inexpensive way to “screen” for radon in a home.


Long-term tests determine the average concentration for a minimum of 90 days. Long-term tests are the best way to estimate the average amount of radon in the home during the year, particularly if a year-long test is done to include both heating and cooling seasons.

EPA Recommends the Following Testing Steps

Step 1

Take a short-term test. If your result is 4.0 pCi/L or higher, take a follow-up test (Step2) to be sure.

Step 2

Follow up with either a long-term test or a second short-term test. For a better understanding of your year-round average radon level, take a long-term test. If you need results quickly, take a second short-term test.

Step 3

If you followed up with a long-term test, fix your home if your long- term test result is 4.0 pCi/L or more. The higher your short-term results, the more certain you can be that you should fix your home. Consider fixing your home if the average of your first and second test is 4.0 pCi/L or higher

Where can I get a radon test kit?

Radon test kits are sold at some hardware or home supply stores. Your local health department may also offer test kits at reduced prices. You can also obtain radon test kits through us. If your home does have high radon and you do choose us to fix your home we will refund your short-term test kit fee. For information on where to obtain low cost radon test kits, contact your state department or feel free to contact iRadon.

Radon Testing Solutions

Real Estate Radon Testing: A 48 Hour Radon Test utilizing a Continuous Radon Monitor (CRM) for Real Estate Transactions. The CRM device is placed in the residence by an iRadon certified technician with results available on site. A hard copy report is provided for the new home-owners records. (Minnesota & border communities)

Professional in-home Testing: A 72 Hour Radon Test utilizing a Continuous Radon Monitor (CRM) placed in your home by an iRadon certified technician with test results available at the completion of the testing period and a hard copy report for the home-owners records!

Short-Term Tests: Offer a quick and inexpensive way to “screen” for radon in your home. These tests do not measure the annual average radon levels, but are typically left in place for 3 to 7 days, sealed up and sent into a 3rd party testing laboratory. Tests less than 48 hours are not valid. Special measures must be taken during a short-test test.

Long-Term Tests: Determine the average concentration for a minimum of 90 days. Long-Term tests are the best way to estimate the average amount of radon in your home during the year, particularly if a year-long test is done to include both heating and cooling seasons.

couple shopping for radon test

What your Radon test results mean?

Initial Short-term Test

  • Less than 2.0 pCi/L – Consider performing a long-term test
  • 2.0 to 10.0 pCi/L – Perform long-term test
  • Greater than 10.0 pCi/L – Perform a second short-term test

Second Short-term Test

  • Less than 8.0 pCi/L – Perform long-term test
  • Mitigation strongly recommended if first test result was also 4.0 pCi/L or greater

Long-term Test

  • Less than 2.0 pCi/L – Retest if major changes made to the home. See EPA guidelines for how often to test
  • Mitigation strongly recommended if first test result was also 4.0 pCi/L or greater

Get Started

Do you have questions about the iRadon testing or mitigation services? Do you need a quote or consultation?

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