Mason City is located in Cerro Gordo County, Iowa.
With 1 user-submitted readings averaging 5.00 pCi/L,
the area exceeds the EPA's 4.0 pCi/L action threshold, and testing is strongly recommended for homeowners in the 50401 zip code.
5.00
pCi/L average
Above EPA Action Level
Based on 1 user-submitted radon test for homes in Mason City, IA. The EPA recommends taking action at or above 4.0 pCi/L.
0
4.0 EPA
10+
Mason City, IA Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
Mason City, IA Radon Testing
Finding qualified radon testing professionals is the first step toward protecting your home.
Mason City, Iowa Radon Levels
User-submitted radon test readings from homes in the Mason City area.
Radon Level
City
Home Age
Foundation
Submitted
5 pCi/L
Mason City, IA
21-50 Years
Full Basement
Jul 2021
Have a radon test result for Mason City? Submit your reading to help other homeowners.
Mason City Radon Facts
Key details about the radon risk profile for Mason City and the 50401 zip code area.
EPA Radon Zone
Zone 1 — High Risk
County
Cerro Gordo County, IA
Zip Code
50401
Predicted Screening Level
> 4.0 pCi/L (Zone 1)
Avg. User Submitted Level
5.00 pCi/L
User Tests Submitted
1
Mason City and the 50401 zip code are located in Cerro Gordo 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 Mason City, IA
What is the average radon level in Mason City, IA?
Based on 1 user-submitted test, the average radon level in Mason City is 5.00 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 Mason City in?
Mason City and the 50401 zip code are in Cerro Gordo 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 Mason City?
Radon mitigation in Mason 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 Mason 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.
