Knoxville, TN Radon Levels

Q: What is the average radon level in Knoxville, TN?

Based on 1 user-submitted tests, the average radon level is 4.00 pCi/L.

Q: What EPA Radon Zone is Knoxville in?

Knoxville is in Knox County, EPA Zone 1.

Q: How much does radon mitigation cost in Knoxville?

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

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

Knoxville, TN Radon Facts

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

County Knox County, TN

Zip Code 37902

Avg. User Level 4.00 pCi/L

User Tests 1

Serving as a major city within Knox County in the Knoxville Metro area, this Tennessee community shows an average radon level of 4.0 pCi/L, right at the EPA's action threshold. Located in zip code 37902 within the Great Valley's limestone and dolomite geology, homes with basements typical of East Tennessee construction should continue regular radon monitoring despite being at the borderline level.

4.00

pCi/L average

Above EPA Action Level

Based on 1 user-submitted radon test for homes in Knoxville, TN. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Knoxville, TN Radon Mitigation

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Knoxville, Tennessee Radon Levels

User-submitted radon test readings from homes in the Knoxville area.

Radon Level	City	Home Age	Foundation	Submitted
4 pCi/L	Knoxville, TN	0-20 Years	Full Basement	Mar 2018

Have a radon test result for Knoxville? Submit your reading to help other homeowners.

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 Knoxville, TN

What is the average radon level in Knoxville, TN?

Based on 1 user-submitted test, the average radon level in Knoxville is 4.00 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is Knoxville in?

Knoxville and the 37902 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.

How much does radon mitigation cost in Knoxville?

Radon mitigation in Knoxville 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 Knoxville?

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.

Radon Levels Near Knoxville, TN

User-submitted radon levels from the cities closest to Knoxville with recorded test data. Explore nearby communities to compare local readings.

City	Distance	Avg User Level	Submissions
Oak Ridge	15.9 mi	7.00 pCi/L	2
Walland	17.2 mi	20.00 pCi/L	1
Maryville	17.5 mi	10.50 pCi/L	2
Lenoir City	18.5 mi	8.00 pCi/L	1
Maynardville	20.1 mi	5.00 pCi/L	1
Oliver Springs	20.9 mi	6.00 pCi/L	1