Saybrook, IL Radon Levels

Q: What EPA Radon Zone is Saybrook in?

Saybrook is in McLean County, EPA Zone 1.

Q: How much does radon mitigation cost in Saybrook?

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

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

Saybrook, IL Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)

County McLean County, IL

Zip Code 61770

Positioned in McLean County within the Bloomington metropolitan area, Saybrook sits atop central Illinois's deep glacial deposits that overlay limestone bedrock formations. The community's housing reflects typical downstate Illinois character, with many homes featuring full basements in older neighborhoods and mixed foundation types in newer developments. While radon testing data for zip code 61770 remains limited, residents should test given McLean County's location within EPA Zone 1 and the region's geological conditions that favor radon production.

8.50

pCi/L area average

Above EPA Action Level

McLean County average: 8.50 pCi/L, based on 8 user-submitted tests across 3 cities in the county. No homeowner readings have been submitted for Saybrook itself yet, so this county figure is the closest available benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Saybrook, IL Radon Mitigation

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

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Radon Readings Near Saybrook, IL

No homeowner tests have been submitted for Saybrook yet. The closest cities with user-submitted radon data are shown below — explore them to gauge local conditions. Radon varies by home, so testing is the only way to know your level.

City	Distance	Avg User Level	Readings
Le Roy	13.7 mi	5.00 pCi/L	1
Mahomet	17.7 mi	5.00 pCi/L	1
Fairbury	21.6 mi	4.00 pCi/L	1
Paxton	22.4 mi	4.00 pCi/L	1
Normal	25.0 mi	7.25 pCi/L	4
Bloomington	25.1 mi	11.33 pCi/L	3
Champaign	25.6 mi	6.67 pCi/L	3
Gifford	27.4 mi	10.00 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 Saybrook, IL

What EPA Radon Zone is Saybrook in?

Saybrook and the 61770 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.

Why are radon readings shown from areas near Saybrook?

No homeowner radon tests have been submitted for Saybrook yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the McLean County average—are the best available indicator of local conditions until Saybrook homeowners submit their own results. The EPA still recommends testing every individual home, since levels can vary significantly from house to house.

How much does radon mitigation cost in Saybrook?

Radon mitigation in Saybrook 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 Saybrook?

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.