Jefferson, NC Radon Mitigation and Testing

Q: What EPA Radon Zone is Jefferson in?

Jefferson is in Ashe County, EPA Zone 2.

Q: How much does radon mitigation cost in Jefferson?

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

Ashe County

EPA Zone 2

Located in the Blue Ridge Mountains of Ashe County, Jefferson sits on ancient crystalline bedrock that can contribute to elevated radon potential in the High Country. Testing data for zip code 28640 is currently limited, making individual home testing particularly valuable. Mountain homes here often feature walk-out basements or crawl spaces built into steep terrain, creating varying radon accumulation conditions.

Jefferson, NC Radon Mitigation

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

Jefferson, NC Radon Testing

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

Jefferson Radon Facts

Key details about the radon risk profile for Jefferson and the 28640 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Ashe County, NC

Zip Code

28640

Predicted Screening Level

2–4 pCi/L (Zone 2)

Jefferson and the 28640 zip code are located in Ashe County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Jefferson, NC

What EPA Radon Zone is Jefferson in?

Jefferson and the 28640 zip code are in Ashe County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

How much does radon mitigation cost in Jefferson?

Radon mitigation in Jefferson 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 Jefferson?

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