Holly Ridge, NC Radon Mitigation and Testing

Q: What EPA Radon Zone is Holly Ridge in?

Holly Ridge is in Onslow County, EPA Zone 3.

Q: How much does radon mitigation cost in Holly Ridge?

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

Located in Onslow County within both Jacksonville and Wilmington Metro areas, Holly Ridge sits on North Carolina's Coastal Plain sediments. The community features predominantly modern residential development with military housing influences, many built on slab and crawl space foundations typical of the coastal region. With no recent testing data available for zip code 28445, residents should pursue radon testing to establish baseline readings.

Holly Ridge, NC Radon Mitigation

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

Holly Ridge, NC Radon Testing

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

Holly Ridge Radon Facts

Key details about the radon risk profile for Holly Ridge and the 28445 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Onslow County, NC

Zip Code

28445

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Holly Ridge and the 28445 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 Holly Ridge, NC

What EPA Radon Zone is Holly Ridge in?

Holly Ridge and the 28445 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 Holly Ridge?

Radon mitigation in Holly Ridge 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 Holly Ridge?

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