Clarkston, GA Radon Levels

Q: What EPA Radon Zone is Clarkston in?

Clarkston is in Dekalb County, EPA Zone 1.

Q: How much does radon mitigation cost in Clarkston?

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

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

Clarkston, GA Radon Facts

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

County Dekalb County, GA

Zip Code 30021

Part of the Atlanta Metro area in DeKalb County, Clarkston sits on Piedmont crystalline bedrock that can produce elevated radon levels in some properties. While testing data for zip code 30021 is currently limited, homeowners should consider radon testing, particularly in properties with basement or crawl space foundations despite Georgia's generally moderate radon risk.

9.50

pCi/L area average

Above EPA Action Level

Dekalb County average: 9.50 pCi/L, based on 10 user-submitted tests across 5 cities in the county. No homeowner readings have been submitted for Clarkston 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+

Clarkston, GA 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 Clarkston, GA

No homeowner tests have been submitted for Clarkston 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
Avondale Estates	2.9 mi	10.00 pCi/L	1
Stone Mountain	3.5 mi	6.00 pCi/L	2
Decatur	4.4 mi	9.00 pCi/L	1
Atlanta	8.6 mi	8.80 pCi/L	5
Lithonia	9.3 mi	20.00 pCi/L	1
Lilburn	10.3 mi	7.50 pCi/L	2
Snellville	13.0 mi	8.75 pCi/L	4
Duluth	14.4 mi	5.00 pCi/L	1

Dekalb County Radon Profile

The bedrock and soils beneath Dekalb County are classified by the EPA as Radon Zone 1, the highest-risk tier, with predicted average indoor screening levels above 4 pCi/L. Homeowner-submitted tests from 5 cities in Dekalb County average 9.50 pCi/L across 10 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. 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 Dekalb County.

Radon FAQ for Clarkston, GA

What EPA Radon Zone is Clarkston in?

Clarkston and the 30021 zip code are in Dekalb 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 Clarkston?

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

Radon mitigation in Clarkston 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 Clarkston?

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.