Festus, MO Radon Levels

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.

Check local Festus radon levels and find certified testing and mitigation professionals to keep your home safe

Festus, MO Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Jefferson County, MO

Zip Code 63028

Avg. User Level 5.00 pCi/L

User Tests 2

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.

Need Radon Mitigation or Testing in Festus?

100% Free, No-Obligation Quotes
Matches You with State-Licensed Jefferson County Pros

1-800-299-3578 636-205-4618 (local) Toll-free · Mon–Fri 8am–6pm ET

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.

Jefferson County Radon Profile

Jefferson County is mapped as EPA Radon Zone 2, where the local geology is predicted to produce moderate indoor screening levels between 2 and 4 pCi/L. Homeowner-submitted tests from 5 cities in Jefferson County average 8.86 pCi/L across 7 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Radon is the second leading cause of lung cancer in the United States, and a short-term test is the only way to confirm a specific home's level in Jefferson County.

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.

Radon Levels Near Festus, MO

User-submitted radon levels from the cities closest to Festus with recorded test data. Explore nearby communities to compare local readings.

City	Distance	Avg User Level	Submissions
De Soto	8.3 mi	11.00 pCi/L	1
Imperial	15.1 mi	13.00 pCi/L	1
Arnold	16.9 mi	10.50 pCi/L	2
House Springs	17.1 mi	7.00 pCi/L	1
Bonne Terre	19.6 mi	4.50 pCi/L	2
Fenton	21.8 mi	16.00 pCi/L	2