Ionia, MO Radon Levels

Q: What EPA Radon Zone is Ionia in?

Ionia is in Benton County, EPA Zone 2.

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

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

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

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

Ionia, MO Radon Facts

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

County Benton County, MO

Zip Code 65335

Located in Benton County along Missouri's central western border, Ionia sits in an area of Pennsylvanian limestone and shale formations. While comprehensive radon testing data is currently limited for the 65335 zip code area, homeowners should prioritize testing given Missouri's variable geological conditions.

5.00

pCi/L area average

Above EPA Action Level

Benton County average: 5.00 pCi/L, based on 2 user-submitted tests across 2 cities in the county. No homeowner readings have been submitted for Ionia 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+

Ionia, 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 Ionia, MO

No homeowner tests have been submitted for Ionia 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
Cole Camp	7.8 mi	5.00 pCi/L	1
Sedalia	14.3 mi	6.00 pCi/L	1
Warsaw	18.2 mi	5.00 pCi/L	1
Warrensburg	28.5 mi	9.00 pCi/L	1
Gravois Mills	31.9 mi	7.00 pCi/L	1
Climax Springs	32.0 mi	2.00 pCi/L	1
Sunrise Beach	37.7 mi	5.00 pCi/L	2
Boonville	44.1 mi	4.00 pCi/L	1

Benton County Radon Profile

EPA mapping assigns Benton County to Radon Zone 2, indicating moderate predicted indoor screening levels in the 2 to 4 pCi/L range based on regional geology. Homeowner-submitted tests from 2 cities in Benton County average 5.00 pCi/L across 2 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. As the second leading cause of lung cancer in the U.S., radon warrants testing in every Benton County home regardless of zone or a neighbor's results.

Radon FAQ for Ionia, MO

What EPA Radon Zone is Ionia in?

Ionia and the 65335 zip code are in Benton 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 Ionia?

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

Radon mitigation in Ionia 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 Ionia?

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.