Iowa City is located in Johnson County, Iowa.
With 1 user-submitted readings averaging 7.00 pCi/L,
the area exceeds the EPA's 4.0 pCi/L action threshold, and testing is strongly recommended for homeowners in the 52240 zip code.
7.00
pCi/L average
Above EPA Action Level
Based on 1 user-submitted radon test for homes in Iowa City, IA. The EPA recommends taking action at or above 4.0 pCi/L.
0
4.0 EPA
10+
Iowa City, IA Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
Iowa City, IA Radon Testing
Finding qualified radon testing professionals is the first step toward protecting your home.
Iowa City, Iowa Radon Levels
User-submitted radon test readings from homes in the Iowa City area.
Radon Level
City
Home Age
Foundation
Submitted
7 pCi/L
Iowa City, IA
21-50 Years
Full Basement
Oct 2024
Have a radon test result for Iowa City? Submit your reading to help other homeowners.
Iowa City Radon Facts
Key details about the radon risk profile for Iowa City and the 52240 zip code area.
EPA Radon Zone
Zone 1 — High Risk
County
Johnson County, IA
Zip Code
52240
Predicted Screening Level
> 4.0 pCi/L (Zone 1)
Avg. User Submitted Level
7.00 pCi/L
User Tests Submitted
1
Iowa City and the 52240 zip code are located in Johnson 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 Iowa City, IA
What is the average radon level in Iowa City, IA?
Based on 1 user-submitted test, the average radon level in Iowa City is 7.00 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 Iowa City in?
Iowa City and the 52240 zip code are in Johnson 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 Iowa City?
Radon mitigation in Iowa City 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 Iowa City?
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.
