Riddleton, TN Radon Levels

Q: What EPA Radon Zone is Riddleton in?

Riddleton is in Smith County, EPA Zone 1.

Q: How much does radon mitigation cost in Riddleton?

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

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

Riddleton, TN Radon Facts

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

County Smith County, TN

Zip Code 37151

Situated in Smith County within the Nashville Metro area, Riddleton sits on Tennessee's Central Basin limestone formations that can contribute to radon production. Testing data for zip code 37151 remains limited, though the region's karst geology suggests potential for elevated radon in certain locations. Homeowners should conduct testing, particularly those with basement foundations or homes near limestone outcrops.

18.00

pCi/L area average

Above EPA Action Level

Smith County average: 18.00 pCi/L, based on 2 user-submitted tests across 2 cities in the county. No homeowner readings have been submitted for Riddleton 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+

Riddleton, 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 Riddleton, TN

No homeowner tests have been submitted for Riddleton 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
Gordonsville	11.6 mi	18.00 pCi/L	1
Lebanon	18.9 mi	5.00 pCi/L	1
Buffalo Valley	19.2 mi	18.00 pCi/L	1
Gallatin	23.3 mi	4.00 pCi/L	1
Mount Juliet	28.4 mi	2.00 pCi/L	1
Cookeville	31.9 mi	4.00 pCi/L	1
Old Hickory	33.1 mi	12.00 pCi/L	1
Hermitage	33.6 mi	4.00 pCi/L	1

Smith County Radon Profile

Because of its underlying geology, Smith County is mapped as EPA Radon Zone 1 — the most elevated classification — where predicted indoor screening averages exceed 4 pCi/L. Homeowner-submitted tests from 2 cities in Smith County average 18.00 pCi/L across 2 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. As the second leading cause of lung cancer in the U.S., radon warrants testing in every Smith County home regardless of zone or a neighbor's results.

Radon FAQ for Riddleton, TN

What EPA Radon Zone is Riddleton in?

Riddleton and the 37151 zip code are in Smith 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 Riddleton?

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

Radon mitigation in Riddleton 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 Riddleton?

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.