Walnut Hill, IL Radon Mitigation and Testing

Q: What EPA Radon Zone is Walnut Hill in?

Walnut Hill is in Marion County, EPA Zone 2.

Q: How much does radon mitigation cost in Walnut Hill?

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

Found in Marion County in south-central Illinois (ZIP 62893), Walnut Hill sits within the Pennsylvanian coal measures that characterize this region of the Illinois Basin. Though specific radon testing data is not currently available for this small community, the area's coal-bearing shale and sandstone formations typically produce moderate radon conditions. Given Marion County's geological characteristics and the potential for radon accumulation in homes with basements, residents should consider testing.

Walnut Hill, IL Radon Mitigation

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

Walnut Hill, IL Radon Testing

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

Walnut Hill Radon Facts

Key details about the radon risk profile for Walnut Hill and the 62893 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Marion County, IL

Zip Code

62893

Predicted Screening Level

2–4 pCi/L (Zone 2)

Walnut Hill and the 62893 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 Walnut Hill, IL

What EPA Radon Zone is Walnut Hill in?

Walnut Hill and the 62893 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 Walnut Hill?

Radon mitigation in Walnut Hill 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 Walnut Hill?

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