Service Area • County seat: Marshalltown
Radon Testing & Mitigation in Marshall County, Iowa.
Marshall County homes average 11.2 pCi/L of radon, 7th of Iowa's 99 counties, higher than Polk County. We test and mitigate in every town in the county.
Iowa-certified • same-day test results • one-visit installs • every system guaranteed below 2.7 pCi/L
The Radon Picture in Marshall County
In tests reported to the CDC Tracking Network from 2008 through 2017, the average Marshall County home measured 11.2 pCi/L before any mitigation, 2.8 times the EPA action level of 4. That ranks 7th among Iowa's 99 counties. Iowa as a whole averages 8.5 pCi/L and the United States 1.3, and every county in the state, Marshall included, is EPA Zone 1.
A county average is a statement about odds, not about your house. Iowa HHS notes that two homes on the same street routinely test very differently, because what matters is the soil under the footprint and how easily gas moves into that particular foundation. Our guide to why Iowa radon runs so high explains the geology; the county ranking shows where Marshall sits against the other 98.
Whatever the number, the fix is the same one we install across central Iowa: a sealed suction point, an exterior fan, a vent above the roofline, and a clearance test, guaranteed below 2.7 pCi/L. See what goes in on our radon mitigation in Des Moines page, or book a certified test first.
Marshall County Data
County average
11.2 pCi/L
Rank of 99
7th
EPA action level
4 pCi/L
Iowa average
8.5 pCi/L
Mean pre-mitigation radon level by county, tests reported 2008–2017, CDC National Environmental Public Health Tracking Network. Iowa and U.S. averages from the Iowa HHS Radon Home Buyers and Sellers Fact Sheet.
Free radon test kit
Yes. Marshall County is in a rural Iowa county covered by the state's free radon test kit program.
Healthy Hometowns: Combat Cancer, run by Marion County Public Health with local health departments across rural Iowa, provides one free radon test kit per household while supplies last. Request it through the program's order form, or ask Marshall County Public Health.
Request a free kit (Healthy Hometowns: Combat Cancer) →A free kit is a mailed charcoal test: results take a couple of weeks, one kit can miss a high reading, and it is not accepted for a real-estate sale. If it comes back at 4.0 pCi/L or higher, the next step is a certified 48-to-72-hour monitor test with same-day results, then a same-day mitigation quote.
The same program is funding mitigation help for rural homeowners whose homes test high. If your kit comes back at 4.0 pCi/L or above, call us: we confirm the number with a certified monitor test, quote a system the same day, and point you to your Marshall County program contact for any assistance you qualify for.
Need a result this week, or for a home sale? Book a certified monitor test. Iowa Radon Hotline: 1-800-383-5992.
Towns We Serve in Marshall County
Every incorporated community in the county, plus the rural addresses between them. Each town page covers the county numbers, the free state test kit, the local housing, and what a test or a system involves there.
Why Marshall County homeowners call All Midwest Radon
Iowa-certified measurement and mitigation specialists, based in the Des Moines metro and on the road in Marshall County every week.
The 2.7 Guarantee
Every system we install is guaranteed below 2.7 pCi/L, the World Health Organization's level, or we return at no charge until it is.
Same-day results
A continuous monitor, 48 to 72 hours, and the report emailed the day it comes out. Scheduled seven days a week, including for home sales.
One-visit installs
Most systems go in during a single visit, with the fan on the least visible side of the house and a clearance test to prove it worked.
Built to last
Quiet Festa AMG fans with a 7-year manufacturer warranty, a 1-year workmanship warranty, and an Iowa-compliant homeowner manual for your records.
Marshall County Radon Questions
Which Marshall County towns does All Midwest Radon serve?
All of them. Our regular routes cover Marshalltown, State Center, Le Grand, Melbourne, Gilman, Albion, plus the rural addresses in between. If you are in Marshall County, you are in our service area.
How does Marshall County compare to the rest of Iowa for radon?
Marshall County's average of 11.2 pCi/L ranks 7th of 99 counties in the CDC's 2008 to 2017 data. Iowa as a whole averages 8.5 pCi/L, and 94 of 99 counties average above the EPA action level of 4. Every county in Iowa is EPA Zone 1.
Can I get a free radon test kit in Marshall County?
Yes. Marshall County households can request one free short-term radon test kit through Healthy Hometowns: Combat Cancer, the state program for rural Iowa, while supplies last. A kit is a good first look, but results take weeks and it is not accepted for a home sale. A certified 48-to-72-hour monitor test gives same-day results, and any reading at 4.0 pCi/L or above should be confirmed that way before mitigation.
Does the county average tell me whether my home has radon?
No. Iowa HHS notes that radon varies considerably from house to house, even between neighbors, because it depends on the soil under the footprint and how easily gas moves into that particular house. The county figure tells you the odds are high; a 48-to-72-hour certified test tells you the answer.
Anywhere in Marshall County.
Certified testing with same-day results, and mitigation guaranteed below 2.7 pCi/L.