Festus, MO Radon Mitigation and Testing

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

Based on 2 user-submitted tests, the average radon level is 5.00 pCi/L.

Q: What EPA Radon Zone is Festus in?

Festus is in Jefferson County, EPA Zone 2.

Q: How much does radon mitigation cost in Festus?

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

Avg: 5.00 pCi/L

Jefferson County

EPA Zone 2

2 user tests

Located in Jefferson County within the St. Louis Metro area, Festus sits on limestone and dolomite bedrock that contributes to regional radon production. The community's housing mix includes both historic downtown buildings and suburban developments, with most homes featuring full or partial basements typical of eastern Missouri construction. Based on limited testing data, Festus shows an average radon level of 5.0 pCi/L, which exceeds the EPA action level of 4.0 pCi/L and warrants mitigation consideration for affected homes.

5.00

pCi/L average

Above EPA Action Level

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

4.0 EPA

10+

Festus, MO Radon Mitigation

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

Festus, MO Radon Testing

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

Festus, Missouri Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
6 pCi/L	Festus, MO	21-50 Years	Partial Basement	Sep 2024
4 pCi/L	Festus, MO	0-20 Years	Full Basement	Jul 2020

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

Festus Radon Facts

Key details about the radon risk profile for Festus and the 63028 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Jefferson County, MO

Zip Code

63028

Predicted Screening Level

2–4 pCi/L (Zone 2)

Avg. User Submitted Level

5.00 pCi/L

User Tests Submitted

Festus and the 63028 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 Festus, MO

What is the average radon level in Festus, MO?

Based on 2 user-submitted tests, the average radon level in Festus 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 Festus in?

Festus and the 63028 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 Festus?

Radon mitigation in Festus 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 Festus?

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