Mazon, IL Radon Levels

Q: What EPA Radon Zone is Mazon in?

Mazon is in Grundy County, EPA Zone 1.

Q: Why are radon readings shown from areas near Mazon?

No homeowner radon tests have been submitted for Mazon yet, so readings from the closest cities and the Grundy County average are used as the best available indicator of local conditions. The EPA recommends testing every individual home.

Q: How much does radon mitigation cost in Mazon?

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

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

Mazon, IL Radon Facts

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

County Grundy County, IL

Zip Code 60444

Located in Grundy County in the southern suburban reaches of the Chicago Metro, Mazon sits on glacial till deposits over Pennsylvanian limestone bedrock. The area's geological conditions create high radon potential, particularly in the many homes with full basements common throughout this region. Testing data for zip code 60444 remains limited, making individual radon testing essential for local residents.

11.00

pCi/L area average

Above EPA Action Level

Grundy County average: 11.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Mazon 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+

Mazon, 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 Mazon, IL

No homeowner tests have been submitted for Mazon 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
Dwight	9.5 mi	7.00 pCi/L	1
Marseilles	15.9 mi	9.00 pCi/L	1
Minooka	17.9 mi	11.00 pCi/L	1
Newark	21.5 mi	11.00 pCi/L	1
Shorewood	22.1 mi	4.00 pCi/L	1
Streator	22.4 mi	7.00 pCi/L	1
Ancona	26.3 mi	20.00 pCi/L	1
Pontiac	26.6 mi	10.50 pCi/L	2

Grundy County Radon Profile

Grundy 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 1 city in Grundy County average 11.00 pCi/L across 1 test — 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 Grundy County to test, as levels can differ between neighboring homes.

Radon FAQ for Mazon, IL

What EPA Radon Zone is Mazon in?

Mazon and the 60444 zip code are in Grundy 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 Mazon?

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

Radon mitigation in Mazon 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 Mazon?

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.