Lena, IL Radon Levels

Q: What EPA Radon Zone is Lena in?

Lena is in Stephenson County, EPA Zone 1.

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

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

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

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

Lena, IL Radon Facts

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

County Stephenson County, IL

Zip Code 61048

Located in northwestern Illinois within Stephenson County, Lena sits on glacial drift deposits that contribute to the region's high radon potential as indicated by its EPA Zone 1 classification. While specific testing data for zip code 61048 remains limited, the area's geological composition of glacial till over limestone bedrock creates conditions highly favorable for radon production and migration. Residents should conduct testing promptly, particularly in older farmhouses and homes with full basements common to this agricultural region.

6.60

pCi/L area average

Above EPA Action Level

Stephenson County average: 6.60 pCi/L, based on 5 user-submitted tests across 3 cities in the county. No homeowner readings have been submitted for Lena 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+

Lena, 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 Lena, IL

No homeowner tests have been submitted for Lena 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
Freeport	11.2 mi	3.67 pCi/L	3
Orangeville	11.3 mi	14.00 pCi/L	1
Lanark	19.7 mi	12.00 pCi/L	3
Davis	21.8 mi	8.00 pCi/L	1
Pecatonica	24.9 mi	11.00 pCi/L	1
Hanover	25.1 mi	5.00 pCi/L	1
Mount Morris	30.4 mi	4.00 pCi/L	1
Galena	30.4 mi	1.00 pCi/L	1

Stephenson County Radon Profile

Because of its underlying geology, Stephenson County is mapped as EPA Radon Zone 1 — the most elevated classification — where predicted indoor screening averages exceed 4 pCi/L. Homeowner-submitted tests from 3 cities in Stephenson County average 6.60 pCi/L across 5 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. As the second leading cause of lung cancer in the U.S., radon warrants testing in every Stephenson County home regardless of zone or a neighbor's results.

Radon FAQ for Lena, IL

What EPA Radon Zone is Lena in?

Lena and the 61048 zip code are in Stephenson 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 Lena?

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

Radon mitigation in Lena 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 Lena?

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.