De Soto, MO Radon Mitigation and Testing

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

Based on 1 user-submitted tests, the average radon level is 11.00 pCi/L.

Q: What EPA Radon Zone is De Soto in?

De Soto is in Jefferson County, EPA Zone 2.

Q: How much does radon mitigation cost in De Soto?

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

Avg: 11.00 pCi/L

Jefferson County

EPA Zone 2

1 user test

Based on recent testing in Jefferson County, De Soto shows an average radon level of 11.0 pCi/L, which significantly exceeds the EPA action threshold of 4.0 pCi/L. This St. Louis Metro community sits atop Ordovician limestone formations that can contribute to elevated radon concentrations in homes with basements. Given this elevated reading in zip code 63020, all area homeowners should prioritize professional radon testing and mitigation if needed.

11.00

pCi/L average

Above EPA Action Level

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

4.0 EPA

10+

De Soto, MO Radon Mitigation

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

De Soto, MO Radon Testing

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

De Soto, Missouri Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
11 pCi/L	De Soto, MO	0-20 Years	Full Basement	Aug 2024

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

De Soto Radon Facts

Key details about the radon risk profile for De Soto and the 63020 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Jefferson County, MO

Zip Code

63020

Predicted Screening Level

2–4 pCi/L (Zone 2)

Avg. User Submitted Level

11.00 pCi/L

User Tests Submitted

De Soto and the 63020 zip code are located in Jefferson 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 De Soto, MO

What is the average radon level in De Soto, MO?

Based on 1 user-submitted test, the average radon level in De Soto is 11.00 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 De Soto in?

De Soto and the 63020 zip code are in Jefferson 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 De Soto?

Radon mitigation in De Soto 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 De Soto?

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