Marshall, NC Radon Levels

Q: What EPA Radon Zone is Marshall in?

Marshall is in Madison County, EPA Zone 2.

Q: How much does radon mitigation cost in Marshall?

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

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

Marshall, NC Radon Facts

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

County Madison County, NC

Zip Code 28753

Positioned in the Blue Ridge foothills of Madison County near Asheville, Marshall sits where ancient Appalachian bedrock creates variable radon conditions throughout the mountain region. Testing data for zip code 28753 remains limited, making individual home testing crucial. Mountain geology and varying elevations can produce unexpected radon levels that require property-specific assessment.

7.92

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 7.92 pCi/L, based on 13 tests from 10 nearby cities. No readings have been submitted for Marshall yet, so the closest recorded data is shown as a benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Marshall, 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 Marshall, NC

No homeowner tests have been submitted for Marshall 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
Candler	22.3 mi	6.00 pCi/L	1
Burnsville	23.9 mi	20.00 pCi/L	1
Swannanoa	23.9 mi	10.00 pCi/L	1
Waynesville	28.1 mi	2.00 pCi/L	1
Fairview	29.0 mi	4.00 pCi/L	1
Black Mountain	29.7 mi	6.33 pCi/L	3
Bakersville	32.4 mi	10.00 pCi/L	1
Old Fort	34.7 mi	4.00 pCi/L	1

Madison County Radon Profile

The soils and bedrock of Madison County place it in EPA Radon Zone 2, a moderate-risk classification with predicted indoor averages of 2 to 4 pCi/L. Few homeowner tests have been logged inside Madison County so far, which is why this page draws on the nearest recorded readings to illustrate regional radon levels. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in Madison County to test, as levels can differ between neighboring homes.

Radon FAQ for Marshall, NC

What EPA Radon Zone is Marshall in?

Marshall and the 28753 zip code are in Madison 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 Marshall?

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

Radon mitigation in Marshall 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 Marshall?

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.