Fall Branch, TN Radon Levels

Q: What EPA Radon Zone is Fall Branch in?

Fall Branch is in Washington County, EPA Zone 1.

Q: How much does radon mitigation cost in Fall Branch?

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

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

Fall Branch, TN Radon Facts

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

County Washington County, TN

Zip Code 37656

Positioned in Washington County within both the Johnson City and Kingsport Metro areas, Fall Branch sits in the Appalachian Valley region of East Tennessee. Testing data for zip code 37656 is currently limited, making individual home testing crucial for residents. The area's complex geology of limestone valleys and surrounding ridges can produce variable radon levels that require property-specific assessment.

6.00

pCi/L area average

Above EPA Action Level

Washington County average: 6.00 pCi/L, based on 9 user-submitted tests across 5 cities in the county. No homeowner readings have been submitted for Fall Branch 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+

Fall Branch, 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 Fall Branch, TN

No homeowner tests have been submitted for Fall Branch 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
Kingsport	9.4 mi	5.00 pCi/L	1
Limestone	11.2 mi	7.00 pCi/L	1
Jonesborough	11.2 mi	7.00 pCi/L	2
Telford	12.8 mi	12.00 pCi/L	1
Johnson City	13.8 mi	4.20 pCi/L	5
Blountville	16.6 mi	20.00 pCi/L	1
Bluff City	22.1 mi	5.00 pCi/L	1
Elizabethton	24.1 mi	7.33 pCi/L	3

Washington County Radon Profile

Because of its underlying geology, Washington 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 5 cities in Washington County average 6.00 pCi/L across 9 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 Washington County home regardless of zone or a neighbor's results.

Radon FAQ for Fall Branch, TN

What EPA Radon Zone is Fall Branch in?

Fall Branch and the 37656 zip code are in Washington 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 Fall Branch?

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

Radon mitigation in Fall Branch 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 Fall Branch?

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.