Onarga, IL Radon Levels

Q: What EPA Radon Zone is Onarga in?

Onarga is in Iroquois County, EPA Zone 1.

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

No homeowner radon tests have been submitted for Onarga yet, so readings from the closest cities and the Iroquois 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 Onarga?

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

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

Onarga, IL Radon Facts

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

County Iroquois County, IL

Zip Code 60955

Situated in Iroquois County within Illinois's central prairie region, Onarga lies over deep glacial moraine deposits and limestone bedrock that contribute to moderate-to-high radon potential. The community's housing includes both historic farmhouses and newer residential construction, many featuring full or partial basements where radon can accumulate. While comprehensive testing data for zip code 60955 is still being collected, homeowners should test their properties given the geological conditions favorable for radon production.

19.00

pCi/L area average

Above EPA Action Level

Iroquois County average: 19.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Onarga 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+

Onarga, 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 Onarga, IL

No homeowner tests have been submitted for Onarga 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
Ashkum	12.3 mi	19.00 pCi/L	1
Paxton	18.5 mi	4.00 pCi/L	1
Fairbury	27.4 mi	4.00 pCi/L	1
Gifford	28.3 mi	10.00 pCi/L	1
Bradley	30.8 mi	5.00 pCi/L	1
Bourbonnais	32.0 mi	4.00 pCi/L	1
Dwight	34.0 mi	7.00 pCi/L	1
Pontiac	35.2 mi	10.50 pCi/L	2

Iroquois County Radon Profile

Iroquois 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 Iroquois County average 19.00 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 Iroquois County to test, as levels can differ between neighboring homes.

Radon FAQ for Onarga, IL

What EPA Radon Zone is Onarga in?

Onarga and the 60955 zip code are in Iroquois 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 Onarga?

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

Radon mitigation in Onarga 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 Onarga?

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.