Wilmington, NC Radon Levels

Q: What EPA Radon Zone is Wilmington in?

Wilmington is in New Hanover County, EPA Zone 3.

Q: What EPA radon zones surround Wilmington, NC?

Wilmington sits in New Hanover County, which the EPA classifies as Radon Zone 3. Among the nearby communities listed above, 8 in Zone 3 (low risk, under 2 pCi/L). EPA radon zones are county-level predictions of radon potential, so the EPA recommends testing every individual home regardless of its zone, since levels vary from house to house.

Q: How much does radon mitigation cost in Wilmington?

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

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

Wilmington, NC Radon Facts

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

County New Hanover County, NC

Zip Code 28401

Positioned in New Hanover County along North Carolina's Cape Fear coast, Wilmington sits on coastal plain sediments that typically result in lower radon concentrations throughout the metropolitan area. While radon testing data for zip codes 28401, 28403, and 28405 remains limited, the region's sandy soils and marine geology generally produce minimal radon accumulation. However, homeowners should still consider periodic testing, particularly in areas with clay layers or in older homes with crawl space foundations.

Wilmington, NC Radon Mitigation

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

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EPA Radon Zones Near Wilmington, NC

No user-submitted radon readings are available for Wilmington or its immediate area yet. The table below shows the EPA radon zone — a county-level prediction of radon risk — for nearby communities. Radon still varies from home to home, so testing is the only way to confirm your level.

City	Distance	County	EPA Radon Zone
Currie	19.7 mi	Pender County	Zone 3
Southport	19.9 mi	Brunswick County	Zone 3
Bolivia	21.3 mi	Brunswick County	Zone 3
Delco	22.1 mi	Columbus County	Zone 3
Burgaw	22.7 mi	Pender County	Zone 3
Riegelwood	23.1 mi	Columbus County	Zone 3
Oak Island	25.4 mi	Brunswick County	Zone 3
Holly Ridge	26.4 mi	Onslow County	Zone 3

New Hanover County Radon Profile

The EPA maps New Hanover County as Radon Zone 3, the lowest predicted classification, with modeled indoor screening levels under 2 pCi/L. Direct test data for New Hanover County remains limited, so the closest neighboring readings are used here to represent the radon conditions homeowners are likely to encounter. As the second leading cause of lung cancer in the U.S., radon warrants testing in every New Hanover County home regardless of zone or a neighbor's results.

Radon FAQ for Wilmington, NC

What EPA Radon Zone is Wilmington in?

Wilmington and the 28401 zip code are in New Hanover 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.

What EPA radon zones surround Wilmington, NC?

Wilmington sits in New Hanover County, which the EPA classifies as Radon Zone 3. Among the nearby communities listed above, 8 in Zone 3 (low risk, under 2 pCi/L). EPA radon zones are county-level predictions of radon potential, so the EPA recommends testing every individual home regardless of its zone, since levels vary from house to house.

How much does radon mitigation cost in Wilmington?

Radon mitigation in Wilmington 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 Wilmington?

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.