Tarkio, MO Radon Levels

Q: What EPA Radon Zone is Tarkio in?

Tarkio is in Atchison County, EPA Zone 1.

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

No homeowner radon tests have been submitted for Tarkio yet, so readings from the closest cities and the Atchison 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 Tarkio?

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

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

Tarkio, MO Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)

County Atchison County, MO

Zip Code 64491

Situated in northwestern Missouri's Atchison County, Tarkio lies in EPA Zone 1 where the region's glacial deposits over limestone bedrock create favorable conditions for radon production. This rural college town's 64491 area features older homes with basements that can accumulate radon if present in the soil. With limited local testing data available, homeowners should prioritize radon testing given the area's geological characteristics.

5.00

pCi/L area average

Above EPA Action Level

Atchison County average: 5.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Tarkio 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+

Tarkio, 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 Tarkio, MO

No homeowner tests have been submitted for Tarkio 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
Rock Port	7.9 mi	5.00 pCi/L	1

Atchison County Radon Profile

The bedrock and soils beneath Atchison County are classified by the EPA as Radon Zone 1, the highest-risk tier, with predicted average indoor screening levels above 4 pCi/L. Homeowner-submitted tests from 1 city in Atchison County average 5.00 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 Atchison County.

Radon FAQ for Tarkio, MO

What EPA Radon Zone is Tarkio in?

Tarkio and the 64491 zip code are in Atchison County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.

Why are radon readings shown from areas near Tarkio?

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

Radon mitigation in Tarkio 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 Tarkio?

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.