Westphalia, MO Radon Levels

Q: What EPA Radon Zone is Westphalia in?

Westphalia is in Osage County, EPA Zone 2.

Q: How much does radon mitigation cost in Westphalia?

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

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

Westphalia, MO Radon Facts

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

County Osage County, MO

Zip Code 65085

Located in Osage County within the Jefferson City metro area, Westphalia sits atop Missouri River valley deposits and underlying Ordovician limestone that can generate moderate radon concentrations. The community's housing mix includes both historic German-settled homes and newer construction, with basement foundations common throughout the area. Although specific radon data for zip code 65085 remains limited, the region's EPA Zone 2 designation suggests homeowners should test their properties to understand individual radon risk.

4.85

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 4.85 pCi/L, based on 13 tests from 10 nearby cities. No readings have been submitted for Westphalia 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+

Westphalia, 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 Westphalia, MO

No homeowner tests have been submitted for Westphalia 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
Jefferson City	12.7 mi	6.00 pCi/L	1
Holts Summit	14.8 mi	4.00 pCi/L	1
Rolla	36.4 mi	4.50 pCi/L	2
Columbia	37.8 mi	3.00 pCi/L	2
Cuba	41.3 mi	5.00 pCi/L	1
Saint Robert	41.7 mi	7.00 pCi/L	1
Gravois Mills	44.0 mi	7.00 pCi/L	1
Sunrise Beach	44.6 mi	5.00 pCi/L	2

Osage County Radon Profile

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

Radon FAQ for Westphalia, MO

What EPA Radon Zone is Westphalia in?

Westphalia and the 65085 zip code are in Osage 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 Westphalia?

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

Radon mitigation in Westphalia 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 Westphalia?

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.