The minimum test period for a radon test done by a licensed radon technician is two days (48 hours), but often ends up being a few hours longer to accommodate the schedules of the test technician and the homeowner. Results are available immediately or within a couple of hours after completion of the test, depending on the type of test device used. 

    When a radon test is done in conjunction with a home inspection, we usually place the test a couple of days before and pick it up at the inspection, so you have the radon results with your home inspection, or start it at the end of inspection and you get the results two days later.

    If you do your own test using a charcoal canister available at hardware and big-box home improvement stores, the minimum test period is 4 days (96 hours), and test results are available anywhere from three days to a week after the lab receives delivery of your canister.

    The two and four-day tests are normally done for real estate transactions or to provide data for a homeowner concerned about the radon level in their home, but longer-term tests of 90 days or more are also available.

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Here’s links to a collection of our blog posts about “RADON":

• Can a radon test result be wrong?

• Is a radon mitigation fan required to be on a dedicated circuit breaker/fuse in the electric panel?

• What happens to a radon test result if the windows were opened, the test device moved, or there was any other evidence of tampering during the test? 

• Where do I find the Florida laws regarding radon?  

• Do older houses have higher radon levels than new houses? 

• Can the seller tamper with a homebuyer's radon test to change the results? 

• Will opening the windows reduce the radon level in a house?

• How was it determined that between 15,000 and 22,000 lung cancer deaths each year are caused by radon?

• Can a homebuyer do their own radon test for a real estate transaction with a self-test kit?

• What is the danger of radon in well water?

• What are the symptoms of radon poisoning? 

• Does Florida have radon?

• Where does radon come from? 

• For how many years does an old radon test result remain valid?

• Should homeowners get a pre-listing radon test before selling their home?

• What are a homebuyer's options when the radon test comes back high (4.0 pico-curies/liter or more)? 

• Do granite countertops emit radon?

• How can I tell if a house has a radon mitigation system? 

• Can a mobile/manufactured home have a high radon problem?

• Do I need to test for radon when buying a condominium? 

• What does a radon mitigation contractor do to lower the radon level in a home?

• How can not testing for radon be an expensive mistake for homebuyers? 

• Will the radon test come back sky-high in a house that has been empty and closed-up for months? 

• What is radon? Should I be concerned about it?

• Should I buy a house with a high radon level? 

• What is the average radon level of indoor and outdoor air in America?

• What is the operating cost of a radon mitigation system? 

• Should I buy a house with a radon mitigation system?

• Does the buyer or seller of a home pay for radon mitigation when the radon test comes back high? 

• What is the probability of having high radon in a Florida house?

• How quickly do I need to reduce a high radon level in my house? 

• Does a home inspector check for radon?

• What are the problems with underground return air ducts? 

• What is the probability of having high radon in a Florida house?

• What factors can change radon test levels up or down?

    Visit our RADON page for other related blog posts on this subject, or go to the INDEX for a complete listing of all our articles.