Thorn Hill, TN Radon Levels

Q: What EPA Radon Zone is Thorn Hill in?

Thorn Hill is in Grainger County, EPA Zone 1.

Q: How much does radon mitigation cost in Thorn Hill?

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

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

Thorn Hill, TN Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)

County Grainger County, TN

Zip Code 37881

Thorn Hill in Grainger County lies within both the Kingsport and Knoxville Metro influence areas, situated on limestone and dolomite bedrock characteristic of East Tennessee's Valley and Ridge province. The rural community features primarily single-family homes with basement and crawl space foundations typical of Appalachian foothill construction. Testing data for zip code 37881 remains limited, making individual radon testing important for homeowners in this geologically complex region.

7.00

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 7.00 pCi/L, based on 11 tests from 10 nearby cities. No readings have been submitted for Thorn Hill 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+

Thorn Hill, TN 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 Thorn Hill, TN

No homeowner tests have been submitted for Thorn Hill 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
Morristown	13.2 mi	7.00 pCi/L	2
Russellville	13.5 mi	9.00 pCi/L	1
Jefferson City	20.1 mi	5.00 pCi/L	1
White Pine	22.0 mi	4.00 pCi/L	1
Maynardville	28.6 mi	5.00 pCi/L	1
La Follette	40.4 mi	12.00 pCi/L	1
Limestone	42.3 mi	7.00 pCi/L	1
Knoxville	45.3 mi	4.00 pCi/L	1

Grainger County Radon Profile

Grainger County falls in EPA Radon Zone 1, meaning the local uranium-bearing geology is predicted to drive average indoor radon screening levels above the EPA's 4 pCi/L action threshold. Few homeowner tests have been logged inside Grainger 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 Grainger County to test, as levels can differ between neighboring homes.

Radon FAQ for Thorn Hill, TN

What EPA Radon Zone is Thorn Hill in?

Thorn Hill and the 37881 zip code are in Grainger County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.

Why are radon readings shown from areas near Thorn Hill?

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

Radon mitigation in Thorn Hill 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 Thorn Hill?

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.