Resources
Radon tools and downloads
Everything here is free and works without giving us your email. Use it to make a decision, whoever you end up hiring.
Should I mitigate?
Answer four questions and get an EPA-aligned recommendation for your situation.
Should I mitigate?
Guidance based on EPA action levels. Your specific situation may vary.
Mitigation recommended
You are at or above the EPA action level of 4.0 pCi/L. The EPA recommends fixing homes at this level.
Cost estimator
A realistic range based on the factors that actually drive radon system pricing.
Radon mitigation cost estimator
An informed range, not a quote. A real number requires a sub-slab communication test at the house.
Typical installed range
$1,400 – $2,200
- Includes diagnostics, system installation, sealing, and a manometer.
- Confirm that post-mitigation verification testing is included in any quote.
Selling or buying a home?
Work backward from your inspection deadline to see when testing has to start.
Radon timeline inside a home sale
Typical scheduling. Actual dates depend on contractor availability and your contract terms.
Order the radon test at the same time as the general home inspection. Closed-house conditions start 12 hours before the device is placed.
Reading your result
EPA radon action levels
Scale shown in picocuries per liter (pCi/L).
Green is at or below the typical US indoor average. Amber is the range where the EPA suggests considering mitigation. Red is at or above the 4.0 pCi/L action level, where the EPA recommends fixing the home.
- 0.4pCi/LOutdoor average
- 1.3pCi/LUS indoor average
- 2.0pCi/LConsider action
- 4.0pCi/LEPA action level
- 10+pCi/LWell above action level
Green is at or below the typical US indoor average. Amber is the range where the EPA suggests considering mitigation. Red is at or above the 4.0 pCi/L action level, where the EPA recommends fixing the home.
pCi/L reference table
Levels reflect EPA guidance for residential indoor air.
| Level | What it means | Recommended action |
|---|---|---|
| 0.0 – 1.9 pCi/L | At or below typical US indoor average (1.3 pCi/L) | No action needed. Retest in about two years. |
| 2.0 – 3.9 pCi/L | Elevated but below the action level | EPA suggests considering mitigation. A long-term test helps confirm. |
| 4.0 – 7.9 pCi/L | At or above the EPA action level | Mitigation recommended. |
| 8.0 – 19.9 pCi/L | Two to five times the action level | Mitigate promptly. |
| 20+ pCi/L | Substantially elevated | Treat as urgent; mitigate as soon as possible. |
Downloadable checklists
- Pre-test closed-house checklistThe 12 conditions that must be true before a short-term test starts, so your result is defensible.
- Hiring a radon contractor: questions to askFifteen questions that separate a diagnostic-driven contractor from a pipe-and-fan installer.
- Radon system owner's maintenance scheduleWhat to check monthly, annually, and every two years once your system is running.
- Real estate radon timeline worksheetMap testing, diagnostics, installation, and retesting against your inspection deadline.
Not sure where to start? Call and ask.
We will walk you through testing, what your result means, and what a system for your home would involve — no pressure either way.