Alexandria, MO Radon Levels

Q: What EPA Radon Zone is Alexandria in?

Alexandria is in Clark County, EPA Zone 2.

Q: How much does radon mitigation cost in Alexandria?

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

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

Alexandria, MO Radon Facts

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

County Clark County, MO

Zip Code 63430

Alexandria in Clark County lies in northeast Missouri, where Pennsylvanian limestone and shale bedrock contribute to the area's EPA Zone 2 radon classification. This rural community's older farmhouses and traditional basements can experience varying radon levels depending on soil conditions and home construction. With testing data currently unavailable for zip code 63430, homeowners should conduct radon testing to establish their property's baseline levels.

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 Alexandria 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+

Alexandria, 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 Alexandria, MO

No homeowner tests have been submitted for Alexandria 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	38.2 mi	8.00 pCi/L	1
Hannibal	44.6 mi	6.00 pCi/L	2

Clark County Radon Profile

The soils and bedrock of Clark 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 Clark 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 Clark County to test, as levels can differ between neighboring homes.

Radon FAQ for Alexandria, MO

What EPA Radon Zone is Alexandria in?

Alexandria and the 63430 zip code are in Clark 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 Alexandria?

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

Radon mitigation in Alexandria 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 Alexandria?

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.