Stem, NC Radon Mitigation and Testing

Q: What is the average radon level in Stem, NC?

Based on 1 user-submitted tests, the average radon level is 3.00 pCi/L.

Q: What EPA Radon Zone is Stem in?

Stem is in Granville County, EPA Zone 3.

Q: How much does radon mitigation cost in Stem?

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

Avg: 3.00 pCi/L

Granville County

EPA Zone 3

1 user test

Stem in north-central North Carolina's Granville County recorded an average radon level of 3.0 pCi/L based on initial testing data. This reading falls within the EPA's recommended range but still warrants continued monitoring, particularly given the area's Triassic basin geology. Properties in zip code 27581 should maintain regular testing schedules to ensure long-term safety.

3.00

pCi/L average

Below EPA Action Level

Based on 1 user-submitted radon test for homes in Stem, NC. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Stem, NC Radon Mitigation

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

Stem, NC Radon Testing

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

Stem, North Carolina Radon Levels

User-submitted radon test readings from homes in the Stem area.

Radon Level	City	Home Age	Foundation	Submitted
3 pCi/L	Stem, NC	0-20 Years	Full Basement	Jun 2021

Have a radon test result for Stem? Submit your reading to help other homeowners.

Stem Radon Facts

Key details about the radon risk profile for Stem and the 27581 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Granville County, NC

Zip Code

27581

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Avg. User Submitted Level

3.00 pCi/L

User Tests Submitted

Stem and the 27581 zip code are located in Granville 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 Stem, NC

What is the average radon level in Stem, NC?

Based on 1 user-submitted test, the average radon level in Stem is 3.00 pCi/L. This is below the EPA's recommended action level of 4.0 pCi/L. However, we recommend all homes be tested regardless of your neighbor's results.

What EPA Radon Zone is Stem in?

Stem and the 27581 zip code are in Granville 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 Stem?

Radon mitigation in Stem 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 Stem?

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