Holly Ridge, NC Radon Levels

Q: What EPA Radon Zone is Holly Ridge in?

Holly Ridge is in Onslow County, EPA Zone 3.

Q: What EPA radon zones surround Holly Ridge, NC?

Holly Ridge 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 Holly Ridge?

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

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

Holly Ridge, NC Radon Facts

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

County Onslow County, NC

Zip Code 28445

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.

Need Radon Mitigation or Testing in Holly Ridge?

100% Free, No-Obligation Quotes
Matches You with State-Licensed Onslow County Pros

1-800-299-3578 704-626-2739 (local) Toll-free · Mon–Fri 8am–6pm ET

EPA Radon Zones Near Holly Ridge, NC

No user-submitted radon readings are available for Holly Ridge 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
Maple Hill	14.4 mi	Pender County	Zone 3
Rocky Point	21.4 mi	Pender County	Zone 3
Burgaw	22.2 mi	Pender County	Zone 3
Wrightsville Beach	23.2 mi	New Hanover County	Zone 3
Castle Hayne	23.5 mi	New Hanover County	Zone 3
Richlands	25.4 mi	Onslow County	Zone 3
Chinquapin	25.8 mi	Duplin County	Zone 3
Wilmington	26.4 mi	New Hanover 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 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.

What EPA radon zones surround Holly Ridge, NC?

Holly Ridge 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 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.