Madison, MO Radon Levels

Q: What EPA Radon Zone is Madison in?

Madison is in Monroe County, EPA Zone 2.

Q: How much does radon mitigation cost in Madison?

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

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

Madison, MO Radon Facts

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

County Monroe County, MO

Zip Code 65263

Located in central Missouri's Monroe County, Madison sits atop limestone and shale formations that characterize much of the state's geology and can contribute to radon accumulation in residential properties. Testing data for zip code 65263 is currently limited, making professional radon assessment important for homeowners in this rural community. The area's housing mix, from historic farmhouses to newer rural construction, all benefit from radon monitoring to establish safe indoor air quality standards.

4.89

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 4.89 pCi/L, based on 9 tests from 6 nearby cities. No readings have been submitted for Madison 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+

Madison, 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 Madison, MO

No homeowner tests have been submitted for Madison 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
Hallsville	24.6 mi	5.00 pCi/L	2
Mexico	27.0 mi	4.00 pCi/L	1
Columbia	35.9 mi	3.00 pCi/L	2
Palmyra	43.3 mi	8.00 pCi/L	1
Boonville	44.7 mi	4.00 pCi/L	1
Hannibal	48.1 mi	6.00 pCi/L	2

Monroe County Radon Profile

EPA mapping assigns Monroe 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 Monroe 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 Monroe County home regardless of zone or a neighbor's results.

Radon FAQ for Madison, MO

What EPA Radon Zone is Madison in?

Madison and the 65263 zip code are in Monroe 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 Madison?

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

Radon mitigation in Madison 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 Madison?

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.