What’s the deal with Radon?

By: Dave Lenhardt


Say what? Radioactive uranium is commonly found in the ground in Massachusetts? And that same radioactive uranium decays into radon, the leading cause of lung cancer in non-smokers? Yep. It’s EV-ERY-WHERE. With that said, take a deep breath and read on. The concentrations typically found in the environment are below what the EPA considers dangerous, and there are ways to figure out how much is in a home and/or reduce those levels to reasonable amounts.


If you’re considering testing for radon during a home inspection period, it’s important to evaluate your timeline before deciding on one test over another. The typical inspection window of 7 to 10 calendar days can be a relatively short amount of time to place a radon test, physically get the samples to a lab, get the results back, and THEN get a quote from a remediation company based on those results.

First, the testing options; here’s a breakdown of some of the main ways to test depending on the amount of time you have to get the results:

Radon table

Next, the fine print: if you’re looking for “worst case scenario”, all of these testing options need to sit in a home with all windows and doors closed during the test period. All of these testing methods will also produce different results depending on the conditions. For instance, a test with windows open will most likely result in lower levels being reported than a similar test with all windows and doors closed. Unusually high winds and unusually severe storms could also have a factor. Radon levels also tend to vary from day to day and season to season.


Even if your Radon levels come back below the standard (4pCi/L), I would suggest testing again with a long term test to get your year-round average. No level of Radon is safe, even levels that pass the standard pose some risk, this risk can be reduced by lowering the Radon levels in your home with a mitigation system. How much do mitigation systems cost? According to sosradon.org, typical radon mitigation systems range from $800 to $1500, with the national average being $1,200. It’s well worth it!

Do you have questions about home buying or selling?  Dave Lenhardt can be reached at:


Kadilak Realty Group @
Keller Williams Boston Northwest

Call or text: 781-557-8673

Facebook: LenhardtHomes
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