Alto Pass, IL Radon Levels

Q: What EPA Radon Zone is Alto Pass in?

Alto Pass is in Union County, EPA Zone 2.

Q: How much does radon mitigation cost in Alto Pass?

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

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

Alto Pass, IL Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Union County, IL

Zip Code 62905

Positioned in Union County near the Shawnee National Forest, Alto Pass sits on sandstone and shale formations that typically produce lower radon levels than northern Illinois. However, with limited testing data available for the 62905 zip code, individual home testing remains the only way to determine actual radon exposure levels.

5.33

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 5.33 pCi/L, based on 3 tests from 3 nearby cities. No readings have been submitted for Alto Pass 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+

Alto Pass, 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 Alto Pass, IL

No homeowner tests have been submitted for Alto Pass 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
Murphysboro	13.7 mi	10.00 pCi/L	1
Marion	23.8 mi	5.00 pCi/L	1
Campbell Hill	28.4 mi	1.00 pCi/L	1

Union County Radon Profile

EPA mapping assigns Union County to Radon Zone 2, indicating moderate predicted indoor screening levels in the 2 to 4 pCi/L range based on regional geology. Direct test data for Union County remains limited, so the closest neighboring readings are used here to represent the radon conditions homeowners are likely to encounter. As the second leading cause of lung cancer in the U.S., radon warrants testing in every Union County home regardless of zone or a neighbor's results.

Radon FAQ for Alto Pass, IL

What EPA Radon Zone is Alto Pass in?

Alto Pass and the 62905 zip code are in Union County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

Why are radon readings shown from areas near Alto Pass?

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

Radon mitigation in Alto Pass 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 Alto Pass?

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.