Ballwin, MO Radon Levels

Q: What is the average radon level in Ballwin, MO?

Based on 1 user-submitted tests, the average radon level is 4.00 pCi/L.

Q: What EPA Radon Zone is Ballwin in?

Ballwin is in St Louis County, EPA Zone Unknown.

Q: How much does radon mitigation cost in Ballwin?

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

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

Ballwin, MO Radon Facts

EPA Radon Zone Unknown Unknown

County St Louis County, MO

Zip Code 63011

Avg. User Level 4.00 pCi/L

User Tests 1

This established suburban community in St. Louis County features predominantly mid-century and newer homes with full basements typical of the St. Louis Metro region. Current radon testing data for Ballwin remains limited, emphasizing the importance of individual home testing for residents in zip codes 63011 and 63021. Missouri's limestone bedrock and clay soils can contribute to variable radon accumulation patterns throughout the area.

4.00

pCi/L average

Above EPA Action Level

Based on 1 user-submitted radon test for homes in Ballwin, MO. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Ballwin, 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 Ballwin, MO

No homeowner tests have been submitted for Ballwin 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
Chesterfield	3.7 mi	5.00 pCi/L	1
Fenton	7.5 mi	16.00 pCi/L	2
Saint Charles	12.1 mi	5.00 pCi/L	1
House Springs	12.5 mi	7.00 pCi/L	1
Saint Peters	13.6 mi	7.00 pCi/L	1
Arnold	14.0 mi	10.50 pCi/L	2
Imperial	14.0 mi	13.00 pCi/L	1
Hazelwood	16.1 mi	20.00 pCi/L	1

St Louis County Radon Profile

St Louis County has not been assigned a definitive EPA radon zone, so the agency recommends that every home be tested regardless of predicted risk. Homeowner-submitted tests from 4 cities in St Louis County average 12.20 pCi/L across 5 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 St Louis County.

Radon FAQ for Ballwin, MO

What is the average radon level in Ballwin, MO?

Based on 1 user-submitted test, the average radon level in Ballwin is 4.00 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is Ballwin in?

Ballwin and the 63011 zip code are in St Louis County, which has an EPA assigned Radon Zone of Unknown. A zone of Unknown does not have sufficient data for classification.

How much does radon mitigation cost in Ballwin?

Radon mitigation in Ballwin 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 Ballwin?

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.