Marshalltown, IA Radon Mitigation and Testing

Q: What is the average radon level in Marshalltown, IA?

Based on 1 user-submitted tests, the average radon level is 9.00 pCi/L.

Q: What EPA Radon Zone is Marshalltown in?

Marshalltown is in Marshall County, EPA Zone 1.

Q: How much does radon mitigation cost in Marshalltown?

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

Avg: 9.00 pCi/L

Marshall County

EPA Zone 1

1 user test

Central Iowa's Marshall County seat shows concerning radon levels, with an average reading of 9.0 pCi/L significantly exceeding the EPA's 4.0 pCi/L action threshold. The 50158 area sits over deep glacial deposits and underlying Paleozoic bedrock that contribute to Iowa's notably high radon potential. Given these elevated readings and the prevalence of full basements in the region's housing stock, residents should prioritize professional radon testing and mitigation systems.

9.00

pCi/L average

Above EPA Action Level

Based on 1 user-submitted radon test for homes in Marshalltown, IA. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Marshalltown, IA Radon Mitigation

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

Marshalltown, IA Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Marshalltown, Iowa Radon Levels

User-submitted radon test readings from homes in the Marshalltown area.

Radon Level	City	Home Age	Foundation	Submitted
9 pCi/L	Marshalltown, IA	51-99 Years	Full Basement	Mar 2018

Have a radon test result for Marshalltown? Submit your reading to help other homeowners.

Marshalltown Radon Facts

Key details about the radon risk profile for Marshalltown and the 50158 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Marshall County, IA

Zip Code

50158

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

9.00 pCi/L

User Tests Submitted

Marshalltown and the 50158 zip code are located in Marshall County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Marshalltown, IA

What is the average radon level in Marshalltown, IA?

Based on 1 user-submitted test, the average radon level in Marshalltown is 9.00 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is Marshalltown in?

Marshalltown and the 50158 zip code are in Marshall 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 Marshalltown?

Radon mitigation in Marshalltown 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 Marshalltown?

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 with the most user-submitted radon test data in the state.

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