Hannibal, MO Radon Mitigation and Testing

Q: What is the average radon level in Hannibal, MO?

Based on 2 user-submitted tests, the average radon level is 6.00 pCi/L.

Q: What EPA Radon Zone is Hannibal in?

Hannibal is in Marion County, EPA Zone 2.

Q: How much does radon mitigation cost in Hannibal?

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

Avg: 6.00 pCi/L

Marion County

EPA Zone 2

2 user tests

Perched along the Mississippi River in Marion County, Hannibal has recorded an average radon level of 6.0 pCi/L based on available testing data, which exceeds the EPA's recommended action threshold of 4.0 pCi/L. The historic river town's mix of 19th and 20th-century homes, many with basements, sits atop limestone bluffs that can facilitate radon entry. Residents should consider professional radon testing and mitigation, particularly given the community's elevated readings and geological setting.

6.00

pCi/L average

Above EPA Action Level

Based on 2 user-submitted radon tests for homes in Hannibal, MO. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Hannibal, MO Radon Mitigation

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

Hannibal, MO Radon Testing

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

Hannibal, Missouri Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
6 pCi/L	Hannibal, MO	21-50 Years	Full Basement	Nov 2017

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

Hannibal Radon Facts

Key details about the radon risk profile for Hannibal and the 63401 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Marion County, MO

Zip Code

63401

Predicted Screening Level

2–4 pCi/L (Zone 2)

Avg. User Submitted Level

6.00 pCi/L

User Tests Submitted

Hannibal and the 63401 zip code are located in Marion County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Hannibal, MO

What is the average radon level in Hannibal, MO?

Based on 2 user-submitted tests, the average radon level in Hannibal is 6.00 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 Hannibal in?

Hannibal and the 63401 zip code are in Marion County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

How much does radon mitigation cost in Hannibal?

Radon mitigation in Hannibal 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 Hannibal?

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 Missouri

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

City	Avg User Radon Level	Submissions
Troy	8.50 pCi/L	4
Lees Summit	7.00 pCi/L	3
Columbia	3.00 pCi/L	2
House Springs	7.00 pCi/L	1
Kansas City	7.00 pCi/L	1
Springfield	7.00 pCi/L	1
Independence	5.00 pCi/L	1
Wentzville	No submissions	0