Jacksonville, NC Radon Mitigation and Testing

Q: What EPA Radon Zone is Jacksonville in?

Jacksonville is in Onslow County, EPA Zone 3.

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.

Onslow County

EPA Zone 3

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.

Jacksonville, NC Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Jacksonville Radon Facts

Key details about the radon risk profile for Jacksonville and the 28540 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Onslow County, NC

Zip Code

28540

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Jacksonville and the 28540 zip code are located in Onslow County, which has an EPA assigned Radon Zone of 3. A radon zone of 3 predicts an average indoor radon screening level less than 2 pCi/L. The EPA recommends testing every home regardless of zone classification.

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.

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.

Most Active Radon Markets in North Carolina

Cities with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
Murphy	12.83 pCi/L	6
Blowing Rock	10.17 pCi/L	6
Brevard	7.50 pCi/L	4
Cary	5.00 pCi/L	4
Highlands	4.50 pCi/L	4
Mooresville	4.00 pCi/L	4
Banner Elk	9.33 pCi/L	3
Charlotte	7.33 pCi/L	3
Denver	4.33 pCi/L	3
Hendersonville	9.00 pCi/L	2
Wake Forest	4.50 pCi/L	2
Apex	3.50 pCi/L	2
Huntersville	3.50 pCi/L	2
Raleigh	9.00 pCi/L	1
Fayetteville	5.00 pCi/L	1
Waxhaw	4.00 pCi/L	1
Chapel Hill	3.00 pCi/L	1
Clayton	No submissions	0
Fuquay Varina	No submissions	0
Holly Springs	No submissions	0