Jefferson, NC Radon Levels

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.

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

Jefferson, NC Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Ashe County, NC

Zip Code 28640

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.

6.50

pCi/L area average

Above EPA Action Level

Ashe County average: 6.50 pCi/L, based on 4 user-submitted tests across 3 cities in the county. No homeowner readings have been submitted for Jefferson 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+

Jefferson, 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 Jefferson, NC

No homeowner tests have been submitted for Jefferson 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
West Jefferson	3.4 mi	3.00 pCi/L	1
Fleetwood	9.7 mi	5.00 pCi/L	1
Todd	10.1 mi	9.00 pCi/L	2
Laurel Springs	10.3 mi	8.00 pCi/L	1
Purlear	15.5 mi	10.00 pCi/L	1
Boone	18.4 mi	16.50 pCi/L	2
North Wilkesboro	22.5 mi	4.00 pCi/L	1
Banner Elk	23.1 mi	9.33 pCi/L	3

Ashe County Radon Profile

EPA mapping assigns Ashe County to Radon Zone 2, indicating moderate predicted indoor screening levels in the 2 to 4 pCi/L range based on regional geology. Homeowner-submitted tests from 3 cities in Ashe County average 6.50 pCi/L across 4 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 Ashe County home regardless of zone or a neighbor's results.

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.

Why are radon readings shown from areas near Jefferson?

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