Erwin, NC Radon Levels

Q: What EPA Radon Zone is Erwin in?

Erwin is in Harnett County, EPA Zone 3.

Q: Why are radon readings shown from areas near Erwin?

No homeowner radon tests have been submitted for Erwin yet, so readings from the closest cities and the Harnett 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 Erwin?

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

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

Erwin, NC Radon Facts

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

County Harnett County, NC

Zip Code 28339

Positioned in Harnett County south of Raleigh, Erwin sits on Coastal Plain sediments that generally produce lower radon levels than North Carolina's Piedmont region. The town's housing mix includes both historic downtown properties and newer suburban development, with many homes built on crawl space foundations common to the area. While radon testing data for zip code 28339 is currently limited, homeowners should still consider testing since individual readings can vary from regional expectations.

5.00

pCi/L area average

Above EPA Action Level

Harnett County average: 5.00 pCi/L, based on 2 user-submitted tests across 1 city in the county. No homeowner readings have been submitted for Erwin 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+

Erwin, 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 Erwin, NC

No homeowner tests have been submitted for Erwin 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	9.6 mi	5.00 pCi/L	1
Lillington	13.3 mi	5.00 pCi/L	2
Fayetteville	23.3 mi	5.00 pCi/L	1
Apex	28.6 mi	3.50 pCi/L	2
Cary	31.5 mi	5.00 pCi/L	4
Raleigh	34.7 mi	9.00 pCi/L	1
Wendell	36.4 mi	20.00 pCi/L	1
Zebulon	40.5 mi	9.00 pCi/L	1

Harnett County Radon Profile

The EPA maps Harnett County as Radon Zone 3, the lowest predicted classification, with modeled indoor screening levels under 2 pCi/L. Homeowner-submitted tests from 1 city in Harnett County average 5.00 pCi/L across 2 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. As the second leading cause of lung cancer in the U.S., radon warrants testing in every Harnett County home regardless of zone or a neighbor's results.

Radon FAQ for Erwin, NC

What EPA Radon Zone is Erwin in?

Erwin and the 28339 zip code are in Harnett 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 Erwin?

No homeowner radon tests have been submitted for Erwin yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Harnett County average—are the best available indicator of local conditions until Erwin 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 Erwin?

Radon mitigation in Erwin 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 Erwin?

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.