Grinnell, IA Radon Levels

Q: What EPA Radon Zone is Grinnell in?

Grinnell is in Poweshiek County, EPA Zone 1.

Q: How much does radon mitigation cost in Grinnell?

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

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

Grinnell, IA Radon Facts

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

County Poweshiek County, IA

Zip Code 50112

The college town of Grinnell sits in Poweshiek County within Iowa's Des Moines Metro region, where glacial deposits over limestone bedrock create geologic conditions that can elevate radon levels. Housing ranges from historic homes near Grinnell College to newer suburban developments, with many properties featuring full basements characteristic of Iowa construction. Though specific testing data for zip code 50112 remains limited, the area's geology suggests residents should conduct radon testing to determine individual home concentrations.

Grinnell, IA Radon Mitigation

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

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Radon FAQ for Grinnell, IA

What EPA Radon Zone is Grinnell in?

Grinnell and the 50112 zip code are in Poweshiek 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.

How much does radon mitigation cost in Grinnell?

Radon mitigation in Grinnell 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 Grinnell?

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.

Most Active Radon Markets in Iowa

Cities in Iowa with the most user-submitted radon test data, ranked by number of submissions.

City	Avg User Radon Level	Submissions
Waterloo	8.50 pCi/L	4
Ames	9.67 pCi/L	3
Fairfield	14.00 pCi/L	2
Mount Pleasant	12.00 pCi/L	2
Ottumwa	5.50 pCi/L	2
Iowa City	7.00 pCi/L	1
Muscatine	No submissions	0