Pearl City, IL Radon Levels

Q: What EPA Radon Zone is Pearl City in?

Pearl City is in Stephenson County, EPA Zone 1.

Q: How much does radon mitigation cost in Pearl City?

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

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

Pearl City, IL Radon Facts

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

County Stephenson County, IL

Zip Code 61062

This small community in Stephenson County sits in northwestern Illinois near the Wisconsin border, where glacial deposits over limestone bedrock create significant radon potential. The area's EPA Zone 1 classification indicates high predicted radon levels typical for this region. Given limited testing data for zip code 61062, Pearl City residents should prioritize radon testing, especially in homes with basements common to northern Illinois construction.

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 Pearl City 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+

Pearl City, 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 Pearl City, IL

No homeowner tests have been submitted for Pearl City 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	10.8 mi	3.67 pCi/L	3
Lanark	11.6 mi	12.00 pCi/L	3
Orangeville	17.7 mi	14.00 pCi/L	1
Hanover	23.0 mi	5.00 pCi/L	1
Pecatonica	25.3 mi	11.00 pCi/L	1
Davis	25.4 mi	8.00 pCi/L	1
Mount Morris	25.4 mi	4.00 pCi/L	1
Byron	30.7 mi	11.50 pCi/L	2

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 Pearl City, IL

What EPA Radon Zone is Pearl City in?

Pearl City and the 61062 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 Pearl City?

No homeowner radon tests have been submitted for Pearl City 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 Pearl City 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 Pearl City?

Radon mitigation in Pearl City 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 Pearl City?

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.