The risk numbers in this tool come from studies of miners who were exposed to radon for many years and later died from lung cancer. Scientists used those results to estimate how many people out of 1,000 might die from lung cancer if they lived in a home with a certain radon level for their whole life. The EPA defines a lifetime as 70 years of breathing the same air in the same house.
A quick, level‑only interpretation of your radon result.
This tool compiles radon risk data with suggested actions based on radon levels to facilitate informed, evidence-based radon decisions.
Does anyone who lives in the home smoke?
Check any that apply:
How long have you lived here?
Do you expect to stay in the home?
Major renovations in the last 12 months?
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Mitigation reduces radon by creating controlled airflow beneath your home and safely venting it outside.
Mitigation systems use a fan and piping to draw radon from beneath the home and release it outdoors.
They are effective, long‑lasting, and work in nearly all home types.
What you can expect to pay.
Pros: Costs range from $1,500 to $2,000 for standard mitigations.
Cons: Complicated mitigation, like that for a crawlspace can cost $3,000 or more.
How well systems reduce radon — and why results vary.
Pros: Reliable reduction, measurable performance, retesting confirms results.
Cons: Some homes need adjustments; older homes may require hybrid systems.
What the system looks and sounds like once installed.
Pros: Many systems can be hidden; fans can be placed for minimal noise.
Cons: Fans produce a steady hum, holes must be drilled in concrete floors and foundations, and some pipes may remain visible in finished rooms.
How long systems last and what upkeep looks like.
Pros: Fans last many years; maintenance is minimal.
Cons: Fans eventually need replacement; some systems require checks.
Crawlspaces, additions, older homes, and unique layouts.
Pros: Most homes can be mitigated; hybrid systems offer flexibility.
Cons: Crawlspaces require more work; older homes may need sealing.