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Is your home at risk
from radon?
Find out if your home is at risk. In 10 seconds.
Coverage for all 3,000+ US counties · EPA zone data · CDC radon averages
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Type your county or state name to instantly see EPA radon zone data and average pCi/L levels.
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We explain what the data means for your home. Plain English, no jargon.
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Find certified radon mitigators near you and get guidance on testing and next steps.
Learn
Radon guides worth reading
What Is Radon? The Complete Guide
Radon is the second leading cause of lung cancer in the US. Here's what it is, where it comes from, and what it means for your home.
How to Test Your Home for Radon (Step by Step)
A short-term test kit costs under $20 and takes 48 hours. Here's exactly what to do, and how to read the results.
Best Radon Test Kits: Tipper's Picks
Three options at different price points, each EPA-approved. Tipper breaks down which one makes sense for your situation.
What to Do If Your Radon Levels Are High
A reading above 4 pCi/L means it's time to act. Here's a calm, clear plan for what to do next.
About Tipper
Your neighbor who actually checked.
Hi, I'm Tipper. I test the smoke detectors on the first of every month, keep the gutters clean before it rains, and yes, I've tested my home for radon twice.
Most people haven't. The information is scattered across dry government pages, manufacturer-owned tools with an obvious bias, and contractor lead-gen sites. Nobody built the independent resource that just answers the question. So I did.
Everything here is built around three questions: What is my risk? What does that mean for me? What should I do next? I cite the EPA and CDC, explain things in plain English, and only recommend products I'd hand to my neighbor.