Harriman, TN Radon Levels

Q: What EPA Radon Zone is Harriman in?

Harriman is in Roane County, EPA Zone 1.

Q: How much does radon mitigation cost in Harriman?

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

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

Harriman, TN Radon Facts

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

County Roane County, TN

Zip Code 37748

Positioned in Roane County within East Tennessee's Ridge and Valley region, Harriman is situated on limestone and shale formations that create favorable conditions for radon gas production. The city's housing stock spans from early 20th-century homes to modern subdivisions, with many properties featuring basements or crawl spaces where radon can accumulate. Given the absence of current testing data for zip code 37748, professional radon testing is strongly recommended for all Harriman residents.

8.85

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 8.85 pCi/L, based on 13 tests from 10 nearby cities. No readings have been submitted for Harriman 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+

Harriman, 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 Harriman, TN

No homeowner tests have been submitted for Harriman 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
Oliver Springs	11.7 mi	6.00 pCi/L	1
Oak Ridge	15.2 mi	7.00 pCi/L	2
Loudon	17.2 mi	9.00 pCi/L	1
Lenoir City	17.9 mi	8.00 pCi/L	1
Crossville	28.1 mi	4.50 pCi/L	2
Knoxville	29.8 mi	4.00 pCi/L	1
Athens	33.4 mi	15.00 pCi/L	1
Maryville	33.4 mi	10.50 pCi/L	2

Roane County Radon Profile

The bedrock and soils beneath Roane County are classified by the EPA as Radon Zone 1, the highest-risk tier, with predicted average indoor screening levels above 4 pCi/L. User-submitted readings are still sparse within Roane County itself, so the nearby measurements shown on this page provide the closest real-world picture of local radon conditions. Radon is the second leading cause of lung cancer in the United States, and a short-term test is the only way to confirm a specific home's level in Roane County.

Radon FAQ for Harriman, TN

What EPA Radon Zone is Harriman in?

Harriman and the 37748 zip code are in Roane 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 Harriman?

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

Radon mitigation in Harriman 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 Harriman?

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.