Castalian Springs, TN Radon Levels

Q: What EPA Radon Zone is Castalian Springs in?

Castalian Springs is in Sumner County, EPA Zone 2.

Q: How much does radon mitigation cost in Castalian Springs?

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

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

Castalian Springs, TN Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Sumner County, TN

Zip Code 37031

Part of the Nashville Metro area in Sumner County, Castalian Springs sits atop Tennessee's limestone-rich geology, which creates moderate radon potential throughout the region. The community features a blend of historic properties and modern suburban homes, with basement and crawl space foundations both common. Given the absence of specific testing data for zip code 37031, homeowners should conduct radon testing to establish baseline levels.

4.00

pCi/L area average

Above EPA Action Level

Sumner 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 Castalian Springs 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+

Castalian Springs, 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 Castalian Springs, TN

No homeowner tests have been submitted for Castalian Springs 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
Gallatin	7.8 mi	4.00 pCi/L	1
Lebanon	15.0 mi	5.00 pCi/L	1
Mount Juliet	17.0 mi	2.00 pCi/L	1
Old Hickory	19.3 mi	12.00 pCi/L	1
White House	20.7 mi	6.00 pCi/L	1
Hermitage	21.0 mi	4.00 pCi/L	1
Gordonsville	22.0 mi	18.00 pCi/L	1
Madison	23.4 mi	5.00 pCi/L	1

Sumner County Radon Profile

EPA mapping assigns Sumner County to Radon Zone 2, indicating moderate predicted indoor screening levels in the 2 to 4 pCi/L range based on regional geology. Homeowner-submitted tests from 1 city in Sumner 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. As the second leading cause of lung cancer in the U.S., radon warrants testing in every Sumner County home regardless of zone or a neighbor's results.

Radon FAQ for Castalian Springs, TN

What EPA Radon Zone is Castalian Springs in?

Castalian Springs and the 37031 zip code are in Sumner County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

Why are radon readings shown from areas near Castalian Springs?

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

Radon mitigation in Castalian Springs 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 Castalian Springs?

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.