Radon in ZIP code 22401
Last updated
ZIP 22401 lies entirely in Fredericksburg city, Virginia. EPA’s radon zone for this area: Zone 1, highest potential.
Predicted average indoor screening level above 4 pCi/L. Zone inherited from Spotsylvania County.
What this means for homes in 22401
EPA built its zone map county by county in 1993, so every address in 22401 shares Fredericksburg city’s prediction. The zone is a starting point, not a measurement of your house. Zone 1 areas like this one have a high share of homes above 4 pCi/L, so testing is a priority.
Next: read how to test your home, then check the number with the level calculator.
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Virginia radon help
Virginia Department of Health, Office of Radiological Health (804-864-8161) can help with test kits, local data and credentialed professionals: www.vdh.virginia.gov/radiological-health/indoor-radon-program.
Frequently asked questions
What is the radon zone for ZIP code 22401?
ZIP 22401 lies in Fredericksburg city, which EPA places in Zone 1 (highest potential).
Should I test for radon in 22401?
Yes. EPA recommends testing every home regardless of zone, because radon varies from house to house. Fix the home if a confirmed result is 4 pCi/L or higher, and consider fixing between 2 and 4 pCi/L.
Free checklist · PDF
Radon Test Checklist
A one-page, step-by-step checklist for running a home radon test right the first time, and what to do with the number.
- Short-term vs. long-term test: which to use
- Closed-house conditions and where to place the kit
- What 2, 4 and 8 pCi/L mean and when to fix
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