Jacksonville, NC Radon Levels

Q: What EPA Radon Zone is Jacksonville in?

Jacksonville is in Onslow County, EPA Zone 3.

Q: What EPA radon zones surround Jacksonville, NC?

Jacksonville sits in Onslow 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 Jacksonville?

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

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

Jacksonville, NC Radon Facts

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

County Onslow County, NC

Zip Code 28540

Situated in Onslow County near Camp Lejeune, Jacksonville's 28540 area currently lacks comprehensive radon testing data. The region's Coastal Plain geology features sandy soils and underlying limestone that can produce moderate radon levels, though individual homes may vary significantly. Military families and civilian residents should consider professional radon testing as part of routine home safety, especially given the transient nature of the community and varying construction standards across different housing eras.

Jacksonville, 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 Jacksonville, NC

No user-submitted radon readings are available for Jacksonville 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
Stella	16.5 mi	Carteret County	Zone 3
Swansboro	16.7 mi	Onslow County	Zone 3
Maple Hill	17.8 mi	Pender County	Zone 3
Holly Ridge	19.5 mi	Onslow County	Zone 3
Chinquapin	20.1 mi	Duplin County	Zone 3
Pollocksville	21.0 mi	Jones County	Zone 3
Trenton	22.1 mi	Jones County	Zone 3
Emerald Isle	23.2 mi	Carteret County	Zone 3

Onslow County Radon Profile

The EPA maps Onslow County as Radon Zone 3, the lowest predicted classification, with modeled indoor screening levels under 2 pCi/L. Direct test data for Onslow 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 Onslow County home regardless of zone or a neighbor's results.

Radon FAQ for Jacksonville, NC

What EPA Radon Zone is Jacksonville in?

Jacksonville and the 28540 zip code are in Onslow 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 Jacksonville, NC?

Jacksonville sits in Onslow 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 Jacksonville?

Radon mitigation in Jacksonville 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 Jacksonville?

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.