Dow, IL Radon Levels

Q: What EPA Radon Zone is Dow in?

Dow is in Jersey County, EPA Zone 1.

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

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

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

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

Dow, IL Radon Facts

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

County Jersey County, IL

Zip Code 62022

Tucked away in Jersey County along the Illinois River valley, Dow sits where Mississippi River floodplain deposits meet underlying Mississippian limestone formations that can contribute to radon accumulation. While comprehensive testing data for zip code 62022 within the St. Louis Metro area remains unavailable, the EPA Zone 1 classification indicates high radon potential. Homeowners should conduct radon testing regardless of whether their properties feature basements, crawl spaces, or slab foundations.

7.00

pCi/L area average

Above EPA Action Level

Jersey County average: 7.00 pCi/L, based on 3 user-submitted tests across 2 cities in the county. No homeowner readings have been submitted for Dow 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+

Dow, 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 Dow, IL

No homeowner tests have been submitted for Dow 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
Jerseyville	6.5 mi	3.50 pCi/L	2
Grafton	7.3 mi	14.00 pCi/L	1
Godfrey	7.8 mi	6.00 pCi/L	1
East Alton	15.7 mi	4.00 pCi/L	1
Granite City	23.4 mi	8.00 pCi/L	1
Glen Carbon	25.8 mi	2.50 pCi/L	2
Staunton	27.7 mi	8.00 pCi/L	1
White Hall	28.0 mi	6.00 pCi/L	1

Jersey County Radon Profile

Jersey 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 2 cities in Jersey County average 7.00 pCi/L across 3 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 Jersey County to test, as levels can differ between neighboring homes.

Radon FAQ for Dow, IL

What EPA Radon Zone is Dow in?

Dow and the 62022 zip code are in Jersey 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 Dow?

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

Radon mitigation in Dow 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 Dow?

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.