Sophia, NC Radon Levels

Q: What EPA Radon Zone is Sophia in?

Sophia is in Randolph County, EPA Zone 3.

Q: Why are radon readings shown from areas near Sophia?

No homeowner radon tests have been submitted for Sophia yet, so readings from the closest cities and the Randolph County average are used as the best available indicator of local conditions. The EPA recommends testing every individual home.

Q: How much does radon mitigation cost in Sophia?

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

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

Sophia, NC Radon Facts

EPA Radon Zone Zone 3 — Low Risk < 2.0 pCi/L (Zone 3)

County Randolph County, NC

Zip Code 27350

Part of the Greensboro Metro area in Randolph County, Sophia sits where North Carolina's Piedmont geology transitions between different rock formations. The community in zip code 27350 currently has limited radon testing data available for analysis. Given the Piedmont region's variable geology mixing granite, slate, and other formations, individual home testing provides the only reliable assessment of radon risk.

5.00

pCi/L area average

Above EPA Action Level

Randolph County average: 5.00 pCi/L, based on 2 user-submitted tests across 1 city in the county. No homeowner readings have been submitted for Sophia 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+

Sophia, 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 Sophia, NC

No homeowner tests have been submitted for Sophia 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
Asheboro	10.9 mi	5.00 pCi/L	2
Winston Salem	26.6 mi	6.33 pCi/L	3
Gibsonville	27.2 mi	6.00 pCi/L	1
Clemmons	31.2 mi	4.00 pCi/L	2
Walnut Cove	36.6 mi	12.00 pCi/L	1
Albemarle	36.9 mi	6.00 pCi/L	1
King	41.1 mi	3.00 pCi/L	1
Efland	43.6 mi	5.00 pCi/L	1

Randolph County Radon Profile

The EPA maps Randolph County as Radon Zone 3, the lowest predicted classification, with modeled indoor screening levels under 2 pCi/L. Homeowner-submitted tests from 1 city in Randolph County average 5.00 pCi/L across 2 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 Randolph County home regardless of zone or a neighbor's results.

Radon FAQ for Sophia, NC

What EPA Radon Zone is Sophia in?

Sophia and the 27350 zip code are in Randolph County, which has an EPA assigned Radon Zone of 3. A zone of 3 predicts an average indoor radon screening level less than 2 pCi/L.

Why are radon readings shown from areas near Sophia?

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

Radon mitigation in Sophia 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 Sophia?

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.