Rio, IL Radon Levels

Q: What EPA Radon Zone is Rio in?

Rio is in Knox County, EPA Zone 1.

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

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

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

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

Rio, IL Radon Facts

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

County Knox County, IL

Zip Code 61472

This small Knox County community in western Illinois sits within the Davenport Metro area atop glacial deposits over limestone bedrock that can contribute to variable radon levels. While specific testing data for zip code 61472 is not available, the geological conditions common to west-central Illinois warrant attention from homeowners. The EPA Zone 1 classification indicates elevated radon potential, making professional testing particularly important for homes with basement foundations.

8.00

pCi/L area average

Above EPA Action Level

Knox County average: 8.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Rio 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+

Rio, 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 Rio, IL

No homeowner tests have been submitted for Rio 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
New Windsor	7.1 mi	6.00 pCi/L	1
Knoxville	14.8 mi	8.00 pCi/L	1
Orion	17.5 mi	4.00 pCi/L	1
Monmouth	19.1 mi	8.00 pCi/L	1
Coal Valley	22.8 mi	12.00 pCi/L	1
Kewanee	25.7 mi	8.00 pCi/L	1
Moline	26.9 mi	5.00 pCi/L	1
Geneseo	27.3 mi	6.00 pCi/L	1

Knox County Radon Profile

The bedrock and soils beneath Knox 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 1 city in Knox County average 8.00 pCi/L across 1 test — 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 Knox County.

Radon FAQ for Rio, IL

What EPA Radon Zone is Rio in?

Rio and the 61472 zip code are in Knox 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 Rio?

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

Radon mitigation in Rio 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 Rio?

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.