Chester, IL Radon Mitigation and Testing

Q: What EPA Radon Zone is Chester in?

Chester is in Randolph County, EPA Zone 2.

Q: How much does radon mitigation cost in Chester?

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 bluffs, Chester sits where river valley alluvial deposits meet underlying Mississippian limestone formations. With limited radon testing data currently available, homeowners should consider professional assessment to understand their property's individual characteristics. The community's mix of historic river town architecture and modern homes can show varying radon accumulation patterns depending on foundation types and local geological conditions.

Chester, IL Radon Mitigation

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

Chester, IL Radon Testing

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

Chester Radon Facts

Key details about the radon risk profile for Chester and the 62233 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Randolph County, IL

Zip Code

62233

Predicted Screening Level

2–4 pCi/L (Zone 2)

Chester and the 62233 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 Chester, IL

What EPA Radon Zone is Chester in?

Chester and the 62233 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 Chester?

Radon mitigation in Chester 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 Chester?

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