Wilmington, NC Radon Mitigation and Testing

Q: What EPA Radon Zone is Wilmington in?

Wilmington is in New Hanover County, EPA Zone 3.

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.

New Hanover County

EPA Zone 3

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.

Wilmington, NC Radon Testing

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

Wilmington Radon Facts

Key details about the radon risk profile for Wilmington and the 28401 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

New Hanover County, NC

Zip Code

28401

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Wilmington and the 28401 zip code are located in New Hanover 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 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.

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.

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