Lone Tree, CO Radon Levels

Q: What EPA Radon Zone is Lone Tree in?

Lone Tree is in Douglas County, EPA Zone 1.

Q: How much does radon mitigation cost in Lone Tree?

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

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

Lone Tree, CO Radon Facts

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

County Douglas County, CO

Zip Code 80124

Located in Douglas County within the Denver Metro area, Lone Tree sits atop geological formations that create high radon potential throughout Colorado's Front Range. The community's modern suburban housing stock, much of it built with full basements, can trap radon gas from the underlying uranium-bearing bedrock. With limited testing data currently available for zip code 80124, residents should prioritize radon testing to determine their home's specific risk level.

7.57

pCi/L area average

Above EPA Action Level

Douglas County average: 7.57 pCi/L, based on 7 user-submitted tests across 3 cities in the county. No homeowner readings have been submitted for Lone Tree 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+

Lone Tree, CO 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 Lone Tree, CO

No homeowner tests have been submitted for Lone Tree 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
Englewood	5.5 mi	11.00 pCi/L	2
Parker	6.6 mi	5.40 pCi/L	5
Littleton	7.1 mi	6.00 pCi/L	2
Aurora	12.2 mi	7.40 pCi/L	5
Denver	13.9 mi	6.22 pCi/L	9
Morrison	15.9 mi	5.00 pCi/L	3
Commerce City	19.0 mi	9.00 pCi/L	1
Sedalia	19.2 mi	20.00 pCi/L	1

Douglas County Radon Profile

Douglas County falls in EPA Radon Zone 1, meaning the local uranium-bearing geology is predicted to drive average indoor radon screening levels above the EPA's 4 pCi/L action threshold. Homeowner-submitted tests from 3 cities in Douglas County average 7.57 pCi/L across 7 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in Douglas County to test, as levels can differ between neighboring homes.

Radon FAQ for Lone Tree, CO

What EPA Radon Zone is Lone Tree in?

Lone Tree and the 80124 zip code are in Douglas 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 Lone Tree?

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

Radon mitigation in Lone Tree 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 Lone Tree?

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.