Cape Girardeau, MO Radon Mitigation and Testing

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

Based on 2 user-submitted tests, the average radon level is 6.50 pCi/L.

Q: What EPA Radon Zone is Cape Girardeau in?

Cape Girardeau is in Cape Girardeau County, EPA Zone 2.

Q: How much does radon mitigation cost in Cape Girardeau?

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

Avg: 6.50 pCi/L

Cape Girardeau County

EPA Zone 2

2 user tests

Situated along the Mississippi River in Cape Girardeau County, this southeastern Missouri city shows radon readings averaging 6.5 pCi/L. Both 63701 and 63703 zip codes exceed the EPA action level, with individual tests ranging from 4.0 to 9.0 pCi/L. The combination of river valley alluvium over limestone bedrock creates conditions favorable for radon accumulation in area homes.

6.50

pCi/L average

Above EPA Action Level

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

4.0 EPA

10+

Cape Girardeau, MO Radon Mitigation

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

Cape Girardeau, MO Radon Testing

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

Cape Girardeau, Missouri Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
9 pCi/L	Cape Girardeau, MO	51-99 Years	Full Basement	Jan 2025
4 pCi/L	Cape Girardeau, MO	51-99 Years	Full Basement	Nov 2024

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

Cape Girardeau Radon Facts

Key details about the radon risk profile for Cape Girardeau and the 63701 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Cape Girardeau County, MO

Zip Code

63701

Predicted Screening Level

2–4 pCi/L (Zone 2)

Avg. User Submitted Level

6.50 pCi/L

User Tests Submitted

Cape Girardeau and the 63701 zip code are located in Cape Girardeau 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 Cape Girardeau, MO

What is the average radon level in Cape Girardeau, MO?

Based on 2 user-submitted tests, the average radon level in Cape Girardeau is 6.50 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 Cape Girardeau in?

Cape Girardeau and the 63701 zip code are in Cape Girardeau 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 Cape Girardeau?

Radon mitigation in Cape Girardeau 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 Cape Girardeau?

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