Saint Mary, MO Radon Levels

Q: What EPA Radon Zone is Saint Mary in?

Saint Mary is in Ste Genevieve County, EPA Zone Unknown.

Q: How much does radon mitigation cost in Saint Mary?

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

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

Saint Mary, MO Radon Facts

EPA Radon Zone Unknown Unknown

County Ste Genevieve County, MO

Zip Code 63673

Rural Ste Genevieve County encompasses Saint Mary, where limited testing data makes individual home assessment crucial for the 63673 zip code. Missouri's limestone geology throughout this southeastern region can create unpredictable radon conditions in both historic farmhouses and newer construction. Professional testing provides the only reliable method to determine your property's radon levels.

7.86

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 7.86 pCi/L, based on 14 tests from 8 nearby cities. No readings have been submitted for Saint Mary 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+

Saint Mary, MO Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

Need Radon Mitigation or Testing in Saint Mary?

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Radon Readings Near Saint Mary, MO

No homeowner tests have been submitted for Saint Mary 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
Farmington	23.9 mi	9.50 pCi/L	2
Bonne Terre	32.2 mi	4.50 pCi/L	2
Festus	34.7 mi	5.00 pCi/L	2
Jackson	35.5 mi	7.00 pCi/L	2
De Soto	37.2 mi	11.00 pCi/L	1
Cape Girardeau	43.5 mi	6.50 pCi/L	2
Imperial	46.9 mi	13.00 pCi/L	1
Arnold	46.9 mi	10.50 pCi/L	2

Ste Genevieve County Radon Profile

Ste Genevieve 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 Ste Genevieve 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 Ste Genevieve County.

Radon FAQ for Saint Mary, MO

What EPA Radon Zone is Saint Mary in?

Saint Mary and the 63673 zip code are in Ste Genevieve 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 Saint Mary?

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

Radon mitigation in Saint Mary 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 Saint Mary?

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.