Alma, IL Radon Mitigation and Testing

Q: What EPA Radon Zone is Alma in?

Alma is in Marion County, EPA Zone 2.

Q: How much does radon mitigation cost in Alma?

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

Marion County

EPA Zone 2

Situated in Marion County in south-central Illinois, Alma experiences moderate radon potential as part of EPA Zone 2. The region's Pennsylvanian-era geology, including coal-bearing deposits and underlying limestone, can contribute to variable radon levels across different properties. Current testing data for zip code 62807 remains limited, making professional radon assessment valuable for homeowners seeking to understand their specific exposure risk.

Alma, IL Radon Mitigation

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

Alma, IL Radon Testing

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

Alma Radon Facts

Key details about the radon risk profile for Alma and the 62807 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Marion County, IL

Zip Code

62807

Predicted Screening Level

2–4 pCi/L (Zone 2)

Alma and the 62807 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 Alma, IL

What EPA Radon Zone is Alma in?

Alma and the 62807 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 Alma?

Radon mitigation in Alma 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 Alma?

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 Illinois

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

City	Avg User Radon Level	Submissions
Buffalo Grove	6.10 pCi/L	10
Crystal Lake	7.25 pCi/L	8
Lake Zurich	6.00 pCi/L	7
Grayslake	5.00 pCi/L	7
New Lenox	10.17 pCi/L	6
Park Ridge	7.00 pCi/L	6
Arlington Heights	6.17 pCi/L	6
Waterloo	9.20 pCi/L	5
Palatine	7.80 pCi/L	5
Round Lake	7.80 pCi/L	5
Northbrook	6.20 pCi/L	5
Mchenry	11.00 pCi/L	4
Dekalb	8.75 pCi/L	4
Columbia	8.00 pCi/L	4
Lisle	7.25 pCi/L	4
Normal	7.25 pCi/L	4
Antioch	7.00 pCi/L	4
Elk Grove Village	7.00 pCi/L	4
Aurora	6.75 pCi/L	4
Hoffman Estates	6.75 pCi/L	4