Petersburg, IL Radon Levels

Q: What EPA Radon Zone is Petersburg in?

Petersburg is in Menard County, EPA Zone 1.

Q: How much does radon mitigation cost in Petersburg?

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

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

Petersburg, IL Radon Facts

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

County Menard County, IL

Zip Code 62675

Situated along the Sangamon River in Menard County, Petersburg lies within central Illinois where deep glacial deposits over limestone bedrock create conditions favorable for radon accumulation. Though comprehensive testing data for the 62675 area remains limited, the region's geological characteristics suggest residents should prioritize radon testing, especially in homes with the full basements common to this historic area.

8.00

pCi/L area average

Above EPA Action Level

Menard County average: 8.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Petersburg 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+

Petersburg, 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 Petersburg, IL

No homeowner tests have been submitted for Petersburg 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
Lincolns New Salem	3.5 mi	8.00 pCi/L	1
Williamsville	16.3 mi	1.00 pCi/L	1
Springfield	18.4 mi	6.50 pCi/L	2
Chatham	24.5 mi	3.00 pCi/L	1
Jacksonville	27.9 mi	9.00 pCi/L	2
Auburn	29.5 mi	6.00 pCi/L	1
Divernon	32.1 mi	7.00 pCi/L	1
Cuba	38.0 mi	6.00 pCi/L	1

Menard County Radon Profile

The bedrock and soils beneath Menard County are classified by the EPA as Radon Zone 1, the highest-risk tier, with predicted average indoor screening levels above 4 pCi/L. Homeowner-submitted tests from 1 city in Menard County average 8.00 pCi/L across 1 test — 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 Menard County.

Radon FAQ for Petersburg, IL

What EPA Radon Zone is Petersburg in?

Petersburg and the 62675 zip code are in Menard 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 Petersburg?

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

Radon mitigation in Petersburg 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 Petersburg?

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.