Chester, IL Radon Levels

Q: What EPA Radon Zone is Chester in?

Chester is in Randolph County, EPA Zone 2.

Q: How much does radon mitigation cost in Chester?

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

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

Chester, IL Radon Facts

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

County Randolph County, IL

Zip Code 62233

Positioned in Randolph County along the Mississippi River bluffs, Chester sits where river valley alluvial deposits meet underlying Mississippian limestone formations. With limited radon testing data currently available, homeowners should consider professional assessment to understand their property's individual characteristics. The community's mix of historic river town architecture and modern homes can show varying radon accumulation patterns depending on foundation types and local geological conditions.

7.81

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 7.81 pCi/L, based on 21 tests from 10 nearby cities. No readings have been submitted for Chester 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+

Chester, 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 Chester, IL

No homeowner tests have been submitted for Chester 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
Campbell Hill	13.2 mi	1.00 pCi/L	1
Marissa	22.9 mi	4.00 pCi/L	1
Murphysboro	28.8 mi	10.00 pCi/L	1
Waterloo	33.0 mi	9.20 pCi/L	5
Mascoutah	38.4 mi	6.50 pCi/L	2
Columbia	41.1 mi	8.00 pCi/L	4
Belleville	43.5 mi	7.33 pCi/L	3
O Fallon	45.3 mi	6.00 pCi/L	1

Randolph County Radon Profile

Randolph 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. User-submitted readings are still sparse within Randolph County itself, so the nearby measurements shown on this page provide the closest real-world picture of local radon conditions. 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 Randolph County.

Radon FAQ for Chester, IL

What EPA Radon Zone is Chester in?

Chester and the 62233 zip code are in Randolph 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 Chester?

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

Radon mitigation in Chester 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 Chester?

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.