Smithville, MO Radon Levels

Q: What EPA Radon Zone is Smithville in?

Smithville is in Clay County, EPA Zone 1.

Q: How much does radon mitigation cost in Smithville?

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

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

Smithville, MO Radon Facts

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

County Clay County, MO

Zip Code 64089

Found in Clay County within the Kansas City Metro, Smithville sits on Missouri River valley deposits over limestone bedrock formations that can contribute to variable radon levels across the area. Limited testing data for zip code 64089 emphasizes the importance of individual home radon testing. The community's suburban development pattern, featuring many homes with full basements typical of Kansas City area construction, creates the below-grade spaces where radon can accumulate effectively.

6.00

pCi/L area average

Above EPA Action Level

Clay County average: 6.00 pCi/L, based on 3 user-submitted tests across 2 cities in the county. No homeowner readings have been submitted for Smithville 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+

Smithville, MO Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

Need Radon Mitigation or Testing in Smithville?

100% Free, No-Obligation Quotes
Matches You with State-Licensed Clay County Pros

1-800-299-3578 816-463-2802 (local) Toll-free · Mon–Fri 8am–6pm ET

Radon Readings Near Smithville, MO

No homeowner tests have been submitted for Smithville 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
Kearney	10.7 mi	5.00 pCi/L	1
Liberty	12.5 mi	6.50 pCi/L	2
Kansas City	19.8 mi	7.00 pCi/L	1
Independence	22.0 mi	5.00 pCi/L	1
Buckner	26.1 mi	6.00 pCi/L	1
Blue Springs	29.8 mi	14.00 pCi/L	1
Grain Valley	31.4 mi	14.00 pCi/L	2
Richmond	32.0 mi	5.00 pCi/L	1

Clay County Radon Profile

The bedrock and soils beneath Clay 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 2 cities in Clay County average 6.00 pCi/L across 3 tests — 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 Clay County.

Radon FAQ for Smithville, MO

What EPA Radon Zone is Smithville in?

Smithville and the 64089 zip code are in Clay 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 Smithville?

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

Radon mitigation in Smithville 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 Smithville?

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.