Seymour, MO Radon Levels

Q: What EPA Radon Zone is Seymour in?

Seymour is in Webster County, EPA Zone 2.

Q: How much does radon mitigation cost in Seymour?

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

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

Seymour, MO Radon Facts

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

County Webster County, MO

Zip Code 65746

Positioned in Webster County as part of the Springfield Metro area, this Ozark community sits atop Missouri's characteristic limestone and dolomite formations. The area's housing stock features a mix of older homes with basements and newer construction, many built over the region's karst geology. Testing data for residents in zip code 65746 remains limited, making individual home testing essential for determining radon levels in this geologically complex region.

7.00

pCi/L area average

Above EPA Action Level

Webster County average: 7.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Seymour itself yet, so this county figure is the closest available benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Seymour, 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 Seymour, MO

No homeowner tests have been submitted for Seymour 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
Marshfield	13.7 mi	7.00 pCi/L	1
Springfield	27.1 mi	7.00 pCi/L	1
Branson	42.8 mi	4.00 pCi/L	1
Reeds Spring	45.1 mi	6.00 pCi/L	1

Webster County Radon Profile

Webster County is mapped as EPA Radon Zone 2, where the local geology is predicted to produce moderate indoor screening levels between 2 and 4 pCi/L. Homeowner-submitted tests from 1 city in Webster County average 7.00 pCi/L across 1 test — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Radon is the second leading cause of lung cancer in the United States, and a short-term test is the only way to confirm a specific home's level in Webster County.

Radon FAQ for Seymour, MO

What EPA Radon Zone is Seymour in?

Seymour and the 65746 zip code are in Webster 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 Seymour?

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

Radon mitigation in Seymour 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 Seymour?

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.