Radon in ZIP code 22601
Last updated
ZIP 22601 crosses 2 county lines. Most of its land (94%) is in Winchester 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 Frederick County.
Predicted average indoor screening level above 4 pCi/L.
What this means for homes in 22601
EPA built its zone map county by county in 1993, so every address in each part of 22601 shares its county’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.
Because 22601 crosses county lines, your county depends on your street. Your property tax bill or county assessor site shows which county you are in. 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 22601?
ZIP 22601 spans 2 counties. The highest-potential zone among them is Zone 1 (highest potential). Winchester city: Zone 1 (94% of the ZIP's land); Frederick County: Zone 1 (6% of the ZIP's land).
Should I test for radon in 22601?
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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