Lewisville, NC Radon Levels

Q: What EPA Radon Zone is Lewisville in?

Lewisville is in Forsyth County, EPA Zone 2.

Q: How much does radon mitigation cost in Lewisville?

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

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

Lewisville, NC Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Forsyth County, NC

Zip Code 27023

Based in Forsyth County as part of the Winston Metro area, Lewisville sits in EPA Zone 2 where moderate radon potential exists throughout the North Carolina Piedmont region. The area's clay soils over metamorphic and igneous bedrock can contribute to variable radon levels in homes across different neighborhoods. With testing data limited for zip code 27023, residents are encouraged to conduct radon testing to determine their homes' specific indoor air quality status.

5.40

pCi/L area average

Above EPA Action Level

Forsyth County average: 5.40 pCi/L, based on 5 user-submitted tests across 4 cities in the county. No homeowner readings have been submitted for Lewisville 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+

Lewisville, 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 Lewisville, NC

No homeowner tests have been submitted for Lewisville 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
Clemmons	4.5 mi	4.00 pCi/L	2
Winston Salem	9.2 mi	6.33 pCi/L	3
King	14.2 mi	3.00 pCi/L	1
Harmony	21.2 mi	5.00 pCi/L	1
Walnut Cove	21.6 mi	12.00 pCi/L	1
Pilot Mountain	22.1 mi	14.00 pCi/L	1
Mount Airy	29.9 mi	5.00 pCi/L	1
Troutman	38.4 mi	12.00 pCi/L	1

Forsyth County Radon Profile

EPA mapping assigns Forsyth County to Radon Zone 2, indicating moderate predicted indoor screening levels in the 2 to 4 pCi/L range based on regional geology. Homeowner-submitted tests from 4 cities in Forsyth County average 5.40 pCi/L across 5 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 Forsyth County home regardless of zone or a neighbor's results.

Radon FAQ for Lewisville, NC

What EPA Radon Zone is Lewisville in?

Lewisville and the 27023 zip code are in Forsyth County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

Why are radon readings shown from areas near Lewisville?

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

Radon mitigation in Lewisville 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 Lewisville?

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.