Annawan, IL Radon Mitigation and Testing

Q: What is the average radon level in Annawan, IL?

Based on 1 user-submitted tests, the average radon level is 10.00 pCi/L.

Q: What EPA Radon Zone is Annawan in?

Annawan is in Henry County, EPA Zone 1.

Q: How much does radon mitigation cost in Annawan?

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

Avg: 10.00 pCi/L

Henry County

EPA Zone 1

1 user test

Situated in Henry County along the Illinois River valley, Annawan features alluvial soils over underlying limestone that contribute to elevated radon potential. The community's single test recorded 10.0 pCi/L, significantly exceeding the EPA action level of 4.0 pCi/L. Given this elevated reading and the area's geological composition of river valley deposits over dolomite bedrock, all homeowners in zip code 61234 should prioritize radon testing.

10.00

pCi/L average

Above EPA Action Level

Based on 1 user-submitted radon test for homes in Annawan, IL. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Annawan, IL Radon Mitigation

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

Annawan, IL Radon Testing

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

Annawan, Illinois Radon Levels

User-submitted radon test readings from homes in the Annawan area.

Radon Level	City	Home Age	Foundation	Submitted
10 pCi/L	Annawan, IL	21-50 Years	Full Basement	Mar 2022

Have a radon test result for Annawan? Submit your reading to help other homeowners.

Annawan Radon Facts

Key details about the radon risk profile for Annawan and the 61234 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Henry County, IL

Zip Code

61234

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

10.00 pCi/L

User Tests Submitted

Annawan and the 61234 zip code are located in Henry 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 Annawan, IL

What is the average radon level in Annawan, IL?

Based on 1 user-submitted test, the average radon level in Annawan is 10.00 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is Annawan in?

Annawan and the 61234 zip code are in Henry 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 Annawan?

Radon mitigation in Annawan 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 Annawan?

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