Radon in ZIP code 24333
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ZIP 24333 crosses 3 county lines. Most of its land (51.6%) is in Grayson County, Virginia. EPA’s radon zone for this area: Zone 2, moderate potential.
Predicted average indoor screening level from 2 to 4 pCi/L.
Predicted average indoor screening level from 2 to 4 pCi/L.
Predicted average indoor screening level from 2 to 4 pCi/L. Zone inherited from Carroll County.
What this means for homes in 24333
EPA built its zone map county by county in 1993, so every address in each part of 24333 shares its county’s prediction. The zone is a starting point, not a measurement of your house. In a Zone 2 area many homes are fine and many are not; only a test tells you which yours is.
Because 24333 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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Nearby ZIP codes in Grayson County
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 24333?
ZIP 24333 spans 3 counties. The highest-potential zone among them is Zone 2 (moderate potential). Grayson County: Zone 2 (51.6% of the ZIP's land); Carroll County: Zone 2 (42.7% of the ZIP's land); Galax city: Zone 2 (5.7% of the ZIP's land).
Should I test for radon in 24333?
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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