Dawson, IL Radon Levels

Q: What EPA Radon Zone is Dawson in?

Dawson is in Sangamon County, EPA Zone 1.

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

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

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

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

Dawson, IL Radon Facts

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

County Sangamon County, IL

Zip Code 62520

Centrally located in Sangamon County within the Springfield Metro area, Dawson sits atop deep glacial moraine deposits over limestone bedrock that contribute to moderate-to-high radon potential across central Illinois. This small community benefits from its proximity to the state capital while maintaining a rural character with traditional Midwestern housing. Although comprehensive radon data for zip code 62520 is limited, the geological context strongly suggests homeowners should test their properties.

5.00

pCi/L area average

Above EPA Action Level

Sangamon County average: 5.00 pCi/L, based on 6 user-submitted tests across 5 cities in the county. No homeowner readings have been submitted for Dawson 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+

Dawson, 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 Dawson, IL

No homeowner tests have been submitted for Dawson 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
Williamsville	8.2 mi	1.00 pCi/L	1
Springfield	11.2 mi	6.50 pCi/L	2
Chatham	18.4 mi	3.00 pCi/L	1
Lincolns New Salem	21.1 mi	8.00 pCi/L	1
Divernon	22.6 mi	7.00 pCi/L	1
Taylorville	23.0 mi	2.00 pCi/L	1
Auburn	23.7 mi	6.00 pCi/L	1
Moweaqua	28.4 mi	7.00 pCi/L	1

Sangamon County Radon Profile

Sangamon County falls in EPA Radon Zone 1, meaning the local uranium-bearing geology is predicted to drive average indoor radon screening levels above the EPA's 4 pCi/L action threshold. Homeowner-submitted tests from 5 cities in Sangamon County average 5.00 pCi/L across 6 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in Sangamon County to test, as levels can differ between neighboring homes.

Radon FAQ for Dawson, IL

What EPA Radon Zone is Dawson in?

Dawson and the 62520 zip code are in Sangamon 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 Dawson?

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

Radon mitigation in Dawson 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 Dawson?

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.