Callao, MO Radon Levels

Q: What EPA Radon Zone is Callao in?

Callao is in Macon County, EPA Zone 2.

Q: Why are radon readings shown from areas near Callao?

No homeowner radon tests have been submitted for Callao yet, so readings from the closest cities and the Macon County average are used as the best available indicator of local conditions. The EPA recommends testing every individual home.

Q: How much does radon mitigation cost in Callao?

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

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

Callao, MO Radon Facts

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

County Macon County, MO

Zip Code 63534

Found in north-central Missouri's Macon County, Callao (63534) sits in EPA Zone 2 over limestone and shale formations that can produce moderate radon concentrations. The area's mix of older farmhouses and newer rural homes features varying foundation types that influence radon entry potential. With limited local testing data available, residents should conduct individual home testing to determine their specific radon exposure levels.

9.33

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 9.33 pCi/L, based on 3 tests from 2 nearby cities. No readings have been submitted for Callao 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+

Callao, 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 Callao, MO

No homeowner tests have been submitted for Callao 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
Meadville	35.5 mi	18.00 pCi/L	1
Hallsville	49.3 mi	5.00 pCi/L	2

Macon County Radon Profile

EPA mapping assigns Macon County to Radon Zone 2, indicating moderate predicted indoor screening levels in the 2 to 4 pCi/L range based on regional geology. Direct test data for Macon County remains limited, so the closest neighboring readings are used here to represent the radon conditions homeowners are likely to encounter. As the second leading cause of lung cancer in the U.S., radon warrants testing in every Macon County home regardless of zone or a neighbor's results.

Radon FAQ for Callao, MO

What EPA Radon Zone is Callao in?

Callao and the 63534 zip code are in Macon 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 Callao?

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

Radon mitigation in Callao 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 Callao?

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.