Hardin, IL Radon Levels

Q: What EPA Radon Zone is Hardin in?

Hardin is in Calhoun County, EPA Zone 1.

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

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

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

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

Hardin, IL Radon Facts

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

County Calhoun County, IL

Zip Code 62047

Perched in Calhoun County within the St. Louis Metro area along the Illinois River, Hardin sits in EPA Zone 1 indicating high radon potential. The region's Mississippi River alluvial deposits over limestone bedrock create conditions conducive to radon accumulation in homes. With testing data for zip code 62047 currently limited, residents should prioritize radon testing to understand their individual property risk.

5.67

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 5.67 pCi/L, based on 12 tests from 10 nearby cities. No readings have been submitted for Hardin yet, so the closest recorded data is shown as a benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Hardin, 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 Hardin, IL

No homeowner tests have been submitted for Hardin 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
Grafton	14.7 mi	14.00 pCi/L	1
Jerseyville	15.7 mi	3.50 pCi/L	2
White Hall	22.4 mi	6.00 pCi/L	1
Godfrey	26.7 mi	6.00 pCi/L	1
Pittsfield	32.4 mi	5.00 pCi/L	1
East Alton	34.7 mi	4.00 pCi/L	1
Griggsville	38.6 mi	4.00 pCi/L	1
Granite City	40.5 mi	8.00 pCi/L	1

Calhoun County Radon Profile

Calhoun 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. Few homeowner tests have been logged inside Calhoun County so far, which is why this page draws on the nearest recorded readings to illustrate regional radon levels. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in Calhoun County to test, as levels can differ between neighboring homes.

Radon FAQ for Hardin, IL

What EPA Radon Zone is Hardin in?

Hardin and the 62047 zip code are in Calhoun 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 Hardin?

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

Radon mitigation in Hardin 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 Hardin?

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.