Denison, IA Radon Mitigation and Testing

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

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

Q: What EPA Radon Zone is Denison in?

Denison is in Crawford County, EPA Zone 1.

Q: How much does radon mitigation cost in Denison?

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

Crawford County

EPA Zone 1

1 user test

Situated in Crawford County within Iowa's glacial till region, Denison shows an average radon level of 9.0 pCi/L, significantly exceeding EPA action guidelines. This single test result from zip code 51442 reflects Iowa's typically elevated radon potential due to uranium-rich glacial deposits over limestone bedrock. Given these high readings and Iowa's geology, all area homeowners should test and likely install mitigation systems.

9.00

pCi/L average

Above EPA Action Level

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

4.0 EPA

10+

Denison, IA Radon Mitigation

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

Denison, IA Radon Testing

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Denison, Iowa Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
9 pCi/L	Denison, IA	21-50 Years	Full Basement	Dec 2019

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

Denison Radon Facts

Key details about the radon risk profile for Denison and the 51442 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Crawford County, IA

Zip Code

51442

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

9.00 pCi/L

User Tests Submitted

Denison and the 51442 zip code are located in Crawford 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 Denison, IA

What is the average radon level in Denison, IA?

Based on 1 user-submitted test, the average radon level in Denison 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 Denison in?

Denison and the 51442 zip code are in Crawford 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 Denison?

Radon mitigation in Denison 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 Denison?

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