Asheville, NC Radon Levels

Q: What EPA Radon Zone is Asheville in?

Asheville is in Buncombe County, EPA Zone 1.

Q: How much does radon mitigation cost in Asheville?

Radon mitigation typically costs between $800 and $2,000. Most standard systems fall in the $1,000-$1,500 range.

Check local Asheville radon levels and find certified testing and mitigation professionals to keep your home safe

Asheville, NC Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)

County Buncombe County, NC

Zip Code 28801

Nestled in the Blue Ridge Mountains of Buncombe County, Asheville's unique mountain geography and crystalline bedrock create highly variable radon conditions across its multiple zip codes (28801-28810). Testing data for the Asheville Metro area remains limited, making professional radon assessment critical for homeowners throughout the region. The city's diverse housing stock, from historic downtown buildings to mountain homes with varied foundation types, requires individual testing to accurately determine radon exposure levels.

6.50

pCi/L area average

Above EPA Action Level

Buncombe County average: 6.50 pCi/L, based on 6 user-submitted tests across 4 cities in the county. No homeowner readings have been submitted for Asheville itself yet, so this county figure is the closest available benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Asheville, NC Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

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Radon Readings Near Asheville, NC

No homeowner tests have been submitted for Asheville yet. The closest cities with user-submitted radon data are shown below — explore them to gauge local conditions. Radon varies by home, so testing is the only way to know your level.

City	Distance	Avg User Level	Readings
Swannanoa	7.9 mi	10.00 pCi/L	1
Fairview	9.5 mi	4.00 pCi/L	1
Candler	9.6 mi	6.00 pCi/L	1
Black Mountain	14.3 mi	6.33 pCi/L	3
Hendersonville	17.9 mi	9.00 pCi/L	2
Old Fort	21.2 mi	4.00 pCi/L	1
Lake Lure	23.2 mi	10.00 pCi/L	1
Pisgah Forest	24.3 mi	20.00 pCi/L	1

Buncombe County Radon Profile

The bedrock and soils beneath Buncombe County are classified by the EPA as Radon Zone 1, the highest-risk tier, with predicted average indoor screening levels above 4 pCi/L. Homeowner-submitted tests from 4 cities in Buncombe County average 6.50 pCi/L across 6 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Radon is the second leading cause of lung cancer in the United States, and a short-term test is the only way to confirm a specific home's level in Buncombe County.

Radon FAQ for Asheville, NC

What EPA Radon Zone is Asheville in?

Asheville and the 28801 zip code are in Buncombe County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.

Why are radon readings shown from areas near Asheville?

No homeowner radon tests have been submitted for Asheville yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Buncombe County average—are the best available indicator of local conditions until Asheville homeowners submit their own results. The EPA still recommends testing every individual home, since levels can vary significantly from house to house.

How much does radon mitigation cost in Asheville?

Radon mitigation in Asheville typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.

Should I test for radon if I'm buying a home in Asheville?

Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.