Penrose, NC Radon Levels

Q: What EPA Radon Zone is Penrose in?

Penrose is in Transylvania County, EPA Zone 1.

Q: How much does radon mitigation cost in Penrose?

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

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

Penrose, NC Radon Facts

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

County Transylvania County, NC

Zip Code 28766

Located in Transylvania County within the Asheville metro area, Penrose sits in North Carolina's Blue Ridge Mountains where granite and metamorphic bedrock can influence radon levels. The area features a mix of mountain homes and newer residential developments, many with basement or crawl space foundations typical of western North Carolina construction. With limited radon testing data available for zip code 28766, residents should conduct testing to assess their specific radon exposure risk.

8.29

pCi/L area average

Above EPA Action Level

Transylvania County average: 8.29 pCi/L, based on 7 user-submitted tests across 4 cities in the county. No homeowner readings have been submitted for Penrose 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+

Penrose, 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 Penrose, NC

No homeowner tests have been submitted for Penrose 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
Pisgah Forest	2.7 mi	20.00 pCi/L	1
Brevard	7.0 mi	7.50 pCi/L	4
Hendersonville	10.0 mi	9.00 pCi/L	2
Rosman	13.5 mi	4.00 pCi/L	1
Lake Toxaway	18.3 mi	4.00 pCi/L	1
Candler	20.2 mi	6.00 pCi/L	1
Fairview	22.7 mi	4.00 pCi/L	1
Tuckasegee	25.5 mi	4.00 pCi/L	1

Transylvania County Radon Profile

Because of its underlying geology, Transylvania County is mapped as EPA Radon Zone 1 — the most elevated classification — where predicted indoor screening averages exceed 4 pCi/L. Homeowner-submitted tests from 4 cities in Transylvania County average 8.29 pCi/L across 7 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. As the second leading cause of lung cancer in the U.S., radon warrants testing in every Transylvania County home regardless of zone or a neighbor's results.

Radon FAQ for Penrose, NC

What EPA Radon Zone is Penrose in?

Penrose and the 28766 zip code are in Transylvania 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 Penrose?

No homeowner radon tests have been submitted for Penrose yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Transylvania County average—are the best available indicator of local conditions until Penrose 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 Penrose?

Radon mitigation in Penrose 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 Penrose?

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.