Smithton, IL Radon Mitigation and Testing

Q: What EPA Radon Zone is Smithton in?

Smithton is in St Clair County, EPA Zone 2.

Q: How much does radon mitigation cost in Smithton?

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

St Clair County

EPA Zone 2

Situated in St. Clair County on the Illinois side of the St. Louis Metro, Smithton lies within Mississippi River floodplain deposits over underlying Mississippian limestone formations. While testing data for zip code 62285 remains limited, the geological setting suggests moderate radon potential that warrants homeowner attention. The community's housing mix includes both slab-on-grade homes common in this region and properties with basement foundations that require specialized radon monitoring approaches.

Smithton, IL Radon Mitigation

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

Smithton, IL Radon Testing

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

Smithton Radon Facts

Key details about the radon risk profile for Smithton and the 62285 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

St Clair County, IL

Zip Code

62285

Predicted Screening Level

2–4 pCi/L (Zone 2)

Smithton and the 62285 zip code are located in St Clair 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 Smithton, IL

What EPA Radon Zone is Smithton in?

Smithton and the 62285 zip code are in St Clair 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 Smithton?

Radon mitigation in Smithton 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 Smithton?

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