Powell, TN Radon Levels

Q: What EPA Radon Zone is Powell in?

Powell is in Knox County, EPA Zone 1.

Q: Why are radon readings shown from areas near Powell?

No homeowner radon tests have been submitted for Powell yet, so readings from the closest cities and the Knox County average are used as the best available indicator of local conditions. The EPA recommends testing every individual home.

Q: How much does radon mitigation cost in Powell?

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

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

Powell, TN Radon Facts

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

County Knox County, TN

Zip Code 37849

Situated in Knox County within the Knoxville Metro area, Powell lies in Tennessee's Ridge and Valley region where limestone and shale formations create high radon potential. The community's location near the Clinch River and its underlying karst geology contribute to conditions favorable for radon accumulation. Testing data for zip code 37849 is currently limited, but the geological setting strongly suggests residents should test their homes for radon.

4.00

pCi/L area average

Above EPA Action Level

Knox County average: 4.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Powell 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+

Powell, 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 Powell, TN

No homeowner tests have been submitted for Powell 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
Knoxville	6.2 mi	4.00 pCi/L	1
Oak Ridge	12.6 mi	7.00 pCi/L	2
Oliver Springs	17.2 mi	6.00 pCi/L	1
Maynardville	17.3 mi	5.00 pCi/L	1
Lenoir City	20.3 mi	8.00 pCi/L	1
Maryville	23.0 mi	10.50 pCi/L	2
Walland	23.4 mi	20.00 pCi/L	1
La Follette	26.5 mi	12.00 pCi/L	1

Knox County Radon Profile

Knox 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. Homeowner-submitted tests from 1 city in Knox County average 4.00 pCi/L across 1 test — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in Knox County to test, as levels can differ between neighboring homes.

Radon FAQ for Powell, TN

What EPA Radon Zone is Powell in?

Powell and the 37849 zip code are in Knox 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 Powell?

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

Radon mitigation in Powell 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 Powell?

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.