u/LibertyRadon

I see a lot of questions about radon results where people ask:
“Is 3.5 pCi/L safe?”
“Is 4.0 a hard cutoff?”
“Does a high reading mean I shouldn’t buy the house?”
The answer is a little more nuanced than just pass/fail.
Radon levels naturally fluctuate, and understanding the number, the EPA action level, testing conditions, and what happens next is important before making decisions about a home.
I put together a homeowner guide covering:
• What different radon levels mean
• Why 4.0 pCi/L is an action guideline, not a “safe vs. dangerous” line
• The difference between consumer monitors and certified testing
• What buyers and homeowners should consider after getting results
Hopefully this helps anyone trying to make sense of a radon report.

[https://www.libertyradon.com/post/what-do-radon-test-results-mean\](https://www.libertyradon.com/post/what-do-radon-test-results-mean)

I spent about 5 years as a lead technician for a radon mitigation company here in Philadelphia, designing and installing systems throughout the city.
One thing that always stood out to me was how many homeowners had never even heard of radon before buying their homes. I walked into countless houses where basements had become offices, playrooms, bedrooms, gyms, workshops, and everyday living spaces — yet many families had no idea they could be exposed to this invisible gas.
I took a lot of pride in the mitigation work I did, but when that chapter ended, I knew I wanted to continue helping people in a different way.
That’s why I started focusing on independent radon testing — helping homeowners, buyers, and families get clear, transparent information about their homes without any pressure to sell a solution.
My goal is simple: help more people in Philadelphia understand radon and make informed decisions about their homes.
If you’re in the Philly area and have questions about radon, home testing, or just want to learn more about something most people never think about, I’d be happy to connect.