Smithton, MO Radon Levels

Q: What EPA Radon Zone is Smithton in?

Smithton is in Pettis County, EPA Zone 2.

Q: How much does radon mitigation cost in Smithton?

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

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

Smithton, MO Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Pettis County, MO

Zip Code 65350

Located in Pettis County within the Columbia Metro area, Smithton sits atop Missouri's characteristic limestone and shale formations that can contribute to elevated radon levels. Testing data for zip code 65350 is currently limited, emphasizing the importance of individual home radon testing. The area's mix of rural properties and small-town residential development, many featuring basement foundations typical of central Missouri construction, benefits from proactive radon monitoring.

6.00

pCi/L area average

Above EPA Action Level

Pettis County average: 6.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Smithton 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+

Smithton, 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 Smithton, MO

No homeowner tests have been submitted for Smithton 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
Sedalia	7.1 mi	6.00 pCi/L	1
Cole Camp	15.0 mi	5.00 pCi/L	1
Boonville	28.2 mi	4.00 pCi/L	1
Gravois Mills	31.8 mi	7.00 pCi/L	1
Warsaw	32.4 mi	5.00 pCi/L	1
Warrensburg	34.2 mi	9.00 pCi/L	1
Climax Springs	36.9 mi	2.00 pCi/L	1
Sunrise Beach	39.0 mi	5.00 pCi/L	2

Pettis County Radon Profile

The soils and bedrock of Pettis County place it in EPA Radon Zone 2, a moderate-risk classification with predicted indoor averages of 2 to 4 pCi/L. Homeowner-submitted tests from 1 city in Pettis County average 6.00 pCi/L across 1 test — 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 Pettis County to test, as levels can differ between neighboring homes.

Radon FAQ for Smithton, MO

What EPA Radon Zone is Smithton in?

Smithton and the 65350 zip code are in Pettis County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

Why are radon readings shown from areas near Smithton?

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

Radon mitigation in Smithton 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 Smithton?

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.