Onarga, IL Radon Mitigation and Testing

Q: What EPA Radon Zone is Onarga in?

Onarga is in Iroquois County, EPA Zone 1.

Q: How much does radon mitigation cost in Onarga?

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

Iroquois County

EPA Zone 1

Situated in Iroquois County within Illinois's central prairie region, Onarga lies over deep glacial moraine deposits and limestone bedrock that contribute to moderate-to-high radon potential. The community's housing includes both historic farmhouses and newer residential construction, many featuring full or partial basements where radon can accumulate. While comprehensive testing data for zip code 60955 is still being collected, homeowners should test their properties given the geological conditions favorable for radon production.

Onarga, IL Radon Mitigation

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

Onarga, IL Radon Testing

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

Onarga Radon Facts

Key details about the radon risk profile for Onarga and the 60955 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Iroquois County, IL

Zip Code

60955

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Onarga and the 60955 zip code are located in Iroquois County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Onarga, IL

What EPA Radon Zone is Onarga in?

Onarga and the 60955 zip code are in Iroquois County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.

How much does radon mitigation cost in Onarga?

Radon mitigation in Onarga 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 Onarga?

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