Radon in ZIP code 28705
Last updated
ZIP 28705 lies entirely in Mitchell County, North Carolina. EPA’s radon zone for this area: Zone 1, highest potential.
Predicted average indoor screening level above 4 pCi/L.
What this means for homes in 28705
EPA built its zone map county by county in 1993, so every address in 28705 shares Mitchell 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.
Next: read how to test your home, then check the number with the level calculator.
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Nearby ZIP codes in Mitchell County
North Carolina radon help
NC NC Department of Health and Human Services, Radon Program (828-712-0972) can help with test kits, local data and credentialed professionals: www.ncdhhs.gov/divisions/health-service-regulation/north-carolina-radon-program.
Frequently asked questions
What is the radon zone for ZIP code 28705?
ZIP 28705 lies in Mitchell County, which EPA places in Zone 1 (highest potential).
Should I test for radon in 28705?
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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