Oblong, IL Radon Levels

Q: What EPA Radon Zone is Oblong in?

Oblong is in Crawford County, EPA Zone 2.

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

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

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

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

Oblong, IL Radon Facts

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

County Crawford County, IL

Zip Code 62449

Positioned in Crawford County within zip code 62449, Oblong sits in southeastern Illinois where Pennsylvanian-era coal measures and underlying limestone create moderate radon potential throughout the region. The area's predominantly rural character features a mix of older farmhouses with stone or block basements alongside newer ranch-style construction. Since local radon testing data remains limited, residents should conduct individual measurements to determine their specific exposure levels.

18.50

pCi/L area average

Above EPA Action Level

Crawford County average: 18.50 pCi/L, based on 2 user-submitted tests across 1 city in the county. No homeowner readings have been submitted for Oblong 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+

Oblong, 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 Oblong, IL

No homeowner tests have been submitted for Oblong 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
Palestine	15.0 mi	18.50 pCi/L	2
Bridgeport	21.5 mi	5.00 pCi/L	1
Effingham	36.7 mi	4.33 pCi/L	3
Charleston	36.8 mi	8.00 pCi/L	1
Mount Carmel	40.9 mi	5.00 pCi/L	2
Mattoon	41.9 mi	9.33 pCi/L	3
Paris	43.6 mi	9.67 pCi/L	3

Crawford County Radon Profile

Crawford County is mapped as EPA Radon Zone 2, where the local geology is predicted to produce moderate indoor screening levels between 2 and 4 pCi/L. Homeowner-submitted tests from 1 city in Crawford County average 18.50 pCi/L across 2 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Radon is the second leading cause of lung cancer in the United States, and a short-term test is the only way to confirm a specific home's level in Crawford County.

Radon FAQ for Oblong, IL

What EPA Radon Zone is Oblong in?

Oblong and the 62449 zip code are in Crawford 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 Oblong?

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

Radon mitigation in Oblong 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 Oblong?

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.