La Grange, MO Radon Levels

Q: What EPA Radon Zone is La Grange in?

La Grange is in Lewis County, EPA Zone 2.

Q: How much does radon mitigation cost in La Grange?

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

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

La Grange, MO Radon Facts

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

County Lewis County, MO

Zip Code 63448

Found in rural Lewis County in northeast Missouri, La Grange currently has limited radon testing data for the 63448 zip code area. The region's Prairie du Chien limestone and glacial deposits create geological conditions that can support radon production and transport. Given the area's typical housing stock of older farmhouses with partial basements and newer rural construction, homeowners are encouraged to conduct radon testing regardless of home age or foundation type.

6.67

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 6.67 pCi/L, based on 3 tests from 2 nearby cities. No readings have been submitted for La Grange 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+

La Grange, 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 La Grange, MO

No homeowner tests have been submitted for La Grange 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
Palmyra	17.1 mi	8.00 pCi/L	1
Hannibal	24.1 mi	6.00 pCi/L	2

Lewis County Radon Profile

The soils and bedrock of Lewis County place it in EPA Radon Zone 2, a moderate-risk classification with predicted indoor averages of 2 to 4 pCi/L. Few homeowner tests have been logged inside Lewis County so far, which is why this page draws on the nearest recorded readings to illustrate regional radon levels. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in Lewis County to test, as levels can differ between neighboring homes.

Radon FAQ for La Grange, MO

What EPA Radon Zone is La Grange in?

La Grange and the 63448 zip code are in Lewis 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 La Grange?

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

Radon mitigation in La Grange 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 La Grange?

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.