Sandoval, IL Radon Levels

Q: What EPA Radon Zone is Sandoval in?

Sandoval is in Marion County, EPA Zone 2.

Q: How much does radon mitigation cost in Sandoval?

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

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

Sandoval, IL Radon Facts

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

County Marion County, IL

Zip Code 62882

Part of Marion County within the St. Louis Metro area, Sandoval sits on Pennsylvanian-era coal measures and shale deposits characteristic of southern Illinois' geology in EPA Zone 2. The community's small-town character includes older residential construction alongside newer homes, many featuring full or partial basements common throughout the region. Testing data for zip code 62882 remains unavailable, making professional radon assessment important for homeowners to understand their individual risk levels.

5.00

pCi/L area average

Above EPA Action Level

Marion County average: 5.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Sandoval 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+

Sandoval, 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 Sandoval, IL

No homeowner tests have been submitted for Sandoval 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
Kell	12.8 mi	5.00 pCi/L	1
Carlyle	14.4 mi	13.00 pCi/L	1
Mount Vernon	23.2 mi	4.00 pCi/L	1
Highland	32.2 mi	6.00 pCi/L	1
Lebanon	37.0 mi	10.50 pCi/L	2
Mascoutah	37.6 mi	6.50 pCi/L	2
Troy	41.5 mi	4.00 pCi/L	1
O Fallon	42.3 mi	6.00 pCi/L	1

Marion County Radon Profile

EPA mapping assigns Marion County to Radon Zone 2, indicating moderate predicted indoor screening levels in the 2 to 4 pCi/L range based on regional geology. Homeowner-submitted tests from 1 city in Marion County average 5.00 pCi/L across 1 test — 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 Marion County home regardless of zone or a neighbor's results.

Radon FAQ for Sandoval, IL

What EPA Radon Zone is Sandoval in?

Sandoval and the 62882 zip code are in Marion 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 Sandoval?

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

Radon mitigation in Sandoval 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 Sandoval?

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.