Selma, NC Radon Mitigation and Testing

Q: What EPA Radon Zone is Selma in?

Selma is in Johnston County, EPA Zone 3.

Q: How much does radon mitigation cost in Selma?

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

Johnston County

EPA Zone 3

Part of the Raleigh Metro area in Johnston County, Selma sits in North Carolina's Piedmont region where crystalline bedrock and residual clay soils create generally low radon conditions. Current testing data for zip code 27576 is limited, though the area's geology typically produces readings well below EPA action levels. Local housing includes both established neighborhoods and newer suburban development with varied foundation types.

Selma, NC Radon Mitigation

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

Selma, NC Radon Testing

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

Selma Radon Facts

Key details about the radon risk profile for Selma and the 27576 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Johnston County, NC

Zip Code

27576

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Selma and the 27576 zip code are located in Johnston 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 Selma, NC

What EPA Radon Zone is Selma in?

Selma and the 27576 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.

How much does radon mitigation cost in Selma?

Radon mitigation in Selma 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 Selma?

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