Caledonia, MO Radon Levels

Q: What EPA Radon Zone is Caledonia in?

Caledonia is in Washington County, EPA Zone Unknown.

Q: How much does radon mitigation cost in Caledonia?

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

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

Caledonia, MO Radon Facts

EPA Radon Zone Unknown Unknown

County Washington County, MO

Zip Code 63631

Found in southeastern Washington County within the Ozark Mountains region, Caledonia sits on complex geological formations that can influence radon levels. The area's mixed housing stock includes both older rural properties and newer residential construction with varying foundation types. Given the absence of comprehensive testing data for zip code 63631, residents should conduct radon tests to establish their home's safety profile.

6.92

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 6.92 pCi/L, based on 13 tests from 10 nearby cities. No readings have been submitted for Caledonia yet, so the closest recorded data is shown as a benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Caledonia, MO 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 Caledonia, MO

No homeowner tests have been submitted for Caledonia 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
Bonne Terre	14.9 mi	4.50 pCi/L	2
Farmington	18.1 mi	9.50 pCi/L	2
De Soto	26.6 mi	11.00 pCi/L	1
Festus	33.9 mi	5.00 pCi/L	2
Leasburg	37.8 mi	4.00 pCi/L	1
Bourbon	38.5 mi	6.00 pCi/L	1
Cuba	42.9 mi	5.00 pCi/L	1
Salem	44.1 mi	6.00 pCi/L	1

Washington County Radon Profile

Washington County has not been assigned a definitive EPA radon zone, so the agency recommends that every home be tested regardless of predicted risk. User-submitted readings are still sparse within Washington County itself, so the nearby measurements shown on this page provide the closest real-world picture of local radon conditions. 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 Washington County.

Radon FAQ for Caledonia, MO

What EPA Radon Zone is Caledonia in?

Caledonia and the 63631 zip code are in Washington County, which has an EPA assigned Radon Zone of Unknown. A zone of Unknown does not have sufficient data for classification.

Why are radon readings shown from areas near Caledonia?

No homeowner radon tests have been submitted for Caledonia 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 Caledonia 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 Caledonia?

Radon mitigation in Caledonia 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 Caledonia?

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.