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Bloomington, IL Radon Levels

Check local Bloomington radon levels and find certified testing and mitigation professionals to keep your home safe


Bloomington, IL Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)
County McLean County, IL
Zip Code 61701
Avg. User Level 11.30 pCi/L
User Tests 3

Home to Illinois State University in McLean County, Bloomington shows elevated radon readings averaging 11.33 pCi/L across multiple zip codes, well above EPA action levels. The city sits atop deep glacial moraine deposits over limestone bedrock typical of central Illinois, with mixed housing stock featuring the full basements where radon readily accumulates.

11.30
pCi/L average
Above EPA Action Level

Based on 3 user-submitted radon tests for homes in Bloomington, IL. The EPA recommends taking action at or above 4.0 pCi/L.

0
4.0 EPA
10+

Bloomington, IL Radon Mitigation

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

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Bloomington, IL Radon Levels

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

Radon LevelCityHome AgeFoundation
4 pCi/L Bloomington, IL 51-99 Years No Basement/All Slab
14 pCi/L Bloomington, IL 0-20 Years Full Basement
16 pCi/L Bloomington, IL 0-20 Years Full Basement

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

Radon Readings Near Bloomington, IL

Compare radon levels in Bloomington with the closest nearby cities that have user-submitted test data.

CityDistanceAvg User LevelReadings
Normal 3.5 mi 7.25 pCi/L 4
Le Roy 15.0 mi 5.00 pCi/L 1
Mackinaw 18.9 mi 20.00 pCi/L 1
Metamora 31.7 mi 7.50 pCi/L 2
Fairbury 32.0 mi 4.00 pCi/L 1
East Peoria 32.4 mi 8.00 pCi/L 3
Pontiac 34.4 mi 10.50 pCi/L 2
Peoria 36.8 mi 5.00 pCi/L 1

McLean County Radon Profile

McLean County falls in EPA Radon Zone 1, meaning the local uranium-bearing geology is predicted to drive average indoor radon screening levels above the EPA's 4 pCi/L action threshold. Homeowner-submitted tests from 3 cities in McLean County average 8.50 pCi/L across 8 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in McLean County to test, as levels can differ between neighboring homes.

Radon FAQ for Bloomington, IL

What is the average radon level in Bloomington, IL?
Based on 3 user-submitted tests, the average radon level in Bloomington is 11.30 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 Bloomington in?
Bloomington and the 61701 zip code are in McLean 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 Bloomington?
Radon mitigation in Bloomington 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 Bloomington?
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.