Princeton, IL Radon Mitigation and Testing

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

Based on 2 user-submitted tests, the average radon level is 11.50 pCi/L.

Q: What EPA Radon Zone is Princeton in?

Princeton is in Bureau County, EPA Zone 1.

Q: How much does radon mitigation cost in Princeton?

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

Avg: 11.50 pCi/L

Bureau County

EPA Zone 1

2 user tests

Princeton is located in Bureau County, Illinois. With 2 user-submitted readings averaging 11.50 pCi/L, the area exceeds the EPA's 4.0 pCi/L action threshold, and testing is strongly recommended for homeowners in the 61356 zip code.

11.50

pCi/L average

Above EPA Action Level

Based on 2 user-submitted radon tests for homes in Princeton, IL. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Princeton, IL Radon Mitigation

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

Princeton, IL Radon Testing

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

Princeton, Illinois Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
8 pCi/L	Princeton, IL	100+ Years	—	Sep 2025
15 pCi/L	Princeton, IL	51-99 Years	Partial Basement	Jun 2019

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

Princeton Radon Facts

Key details about the radon risk profile for Princeton and the 61356 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Bureau County, IL

Zip Code

61356

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

11.50 pCi/L

User Tests Submitted

Princeton and the 61356 zip code are located in Bureau 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 Princeton, IL

What is the average radon level in Princeton, IL?

Based on 2 user-submitted tests, the average radon level in Princeton is 11.50 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 Princeton in?

Princeton and the 61356 zip code are in Bureau 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 Princeton?

Radon mitigation in Princeton 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 Princeton?

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