Four Oaks, NC Radon Levels

Q: What EPA Radon Zone is Four Oaks in?

Four Oaks is in Johnston County, EPA Zone 3.

Q: Why are radon readings shown from areas near Four Oaks?

No homeowner radon tests have been submitted for Four Oaks yet, so readings from the closest cities and the Johnston County average are used as the best available indicator of local conditions. The EPA recommends testing every individual home.

Q: How much does radon mitigation cost in Four Oaks?

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

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

Four Oaks, NC Radon Facts

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

County Johnston County, NC

Zip Code 27524

Positioned in Johnston County within the expanding Raleigh Metro area, Four Oaks currently has minimal radon testing data available through our records. Eastern North Carolina's coastal plain geology typically produces lower radon levels, consistent with the community's EPA Zone 3 classification. However, homeowners in ZIP code 27524 should still conduct testing, particularly as new residential development may encounter varying soil conditions that could affect individual property radon levels.

5.00

pCi/L area average

Above EPA Action Level

Johnston County average: 5.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Four Oaks itself yet, so this county figure is the closest available benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Four Oaks, NC Radon Mitigation

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

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Radon Readings Near Four Oaks, NC

No homeowner tests have been submitted for Four Oaks yet. The closest cities with user-submitted radon data are shown below — explore them to gauge local conditions. Radon varies by home, so testing is the only way to know your level.

City	Distance	Avg User Level	Readings
Benson	7.1 mi	5.00 pCi/L	1
Wendell	27.3 mi	20.00 pCi/L	1
Lillington	28.9 mi	5.00 pCi/L	2
Zebulon	30.1 mi	9.00 pCi/L	1
Raleigh	32.2 mi	9.00 pCi/L	1
Apex	32.5 mi	3.50 pCi/L	2
Cary	33.8 mi	5.00 pCi/L	4
Fayetteville	37.4 mi	5.00 pCi/L	1

Johnston County Radon Profile

Johnston County is classified as EPA Radon Zone 3, the lowest predicted-risk tier, with modeled indoor screening averages below 2 pCi/L. Homeowner-submitted tests from 1 city in Johnston County average 5.00 pCi/L across 1 test — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Radon is the second leading cause of lung cancer in the United States, and a short-term test is the only way to confirm a specific home's level in Johnston County.

Radon FAQ for Four Oaks, NC

What EPA Radon Zone is Four Oaks in?

Four Oaks and the 27524 zip code are in Johnston 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.

Why are radon readings shown from areas near Four Oaks?

No homeowner radon tests have been submitted for Four Oaks yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Johnston County average—are the best available indicator of local conditions until Four Oaks homeowners submit their own results. The EPA still recommends testing every individual home, since levels can vary significantly from house to house.

How much does radon mitigation cost in Four Oaks?

Radon mitigation in Four Oaks 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 Four Oaks?

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.