Modoc, IL Radon Mitigation and Testing

Q: What EPA Radon Zone is Modoc in?

Modoc is in Randolph County, EPA Zone 2.

Q: How much does radon mitigation cost in Modoc?

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

Randolph County

EPA Zone 2

Positioned in Randolph County along the Mississippi River floodplain, Modoc benefits from alluvial deposits that generally moderate radon accumulation compared to areas with exposed limestone. Testing data for zip code 62261 remains sparse, encouraging residents to establish baseline readings through professional measurement. The community's rural character includes older farmsteads where foundation types can significantly influence indoor radon levels.

Modoc, IL Radon Mitigation

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

Modoc, IL Radon Testing

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

Modoc Radon Facts

Key details about the radon risk profile for Modoc and the 62261 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Randolph County, IL

Zip Code

62261

Predicted Screening Level

2–4 pCi/L (Zone 2)

Modoc and the 62261 zip code are located in Randolph 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 Modoc, IL

What EPA Radon Zone is Modoc in?

Modoc and the 62261 zip code are in Randolph 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 Modoc?

Radon mitigation in Modoc 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 Modoc?

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