Sheridan, IL Radon Levels

Q: What EPA Radon Zone is Sheridan in?

Sheridan is in La Salle County, EPA Zone 1.

Q: How much does radon mitigation cost in Sheridan?

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

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

Sheridan, IL Radon Facts

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

County La Salle County, IL

Zip Code 60551

Northern Illinois community Sheridan sits in La Salle County within the Illinois River valley, where glacial deposits over limestone bedrock create high radon potential across the region. Testing data for the 60551 area is currently limited, but the EPA Zone 1 classification and underlying geology strongly encourage comprehensive radon testing for all residents.

8.00

pCi/L area average

Above EPA Action Level

La Salle County average: 8.00 pCi/L, based on 5 user-submitted tests across 4 cities in the county. No homeowner readings have been submitted for Sheridan 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+

Sheridan, 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 Sheridan, IL

No homeowner tests have been submitted for Sheridan 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
Newark	7.5 mi	11.00 pCi/L	1
Plano	12.4 mi	10.00 pCi/L	1
Marseilles	12.9 mi	9.00 pCi/L	1
Earlville	13.3 mi	11.00 pCi/L	1
Yorkville	14.5 mi	6.00 pCi/L	2
Minooka	20.6 mi	11.00 pCi/L	1
Sugar Grove	21.4 mi	7.00 pCi/L	1
Montgomery	22.3 mi	8.50 pCi/L	2

La Salle County Radon Profile

The bedrock and soils beneath La Salle County are classified by the EPA as Radon Zone 1, the highest-risk tier, with predicted average indoor screening levels above 4 pCi/L. Homeowner-submitted tests from 4 cities in La Salle County average 8.00 pCi/L across 5 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Radon is the second leading cause of lung cancer in the United States, and a short-term test is the only way to confirm a specific home's level in La Salle County.

Radon FAQ for Sheridan, IL

What EPA Radon Zone is Sheridan in?

Sheridan and the 60551 zip code are in La Salle 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 Sheridan?

No homeowner radon tests have been submitted for Sheridan yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the La Salle County average—are the best available indicator of local conditions until Sheridan 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 Sheridan?

Radon mitigation in Sheridan 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 Sheridan?

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.