Marengo, WI Radon Levels

Q: What EPA Radon Zone is Marengo in?

Marengo is in Ashland County, EPA Zone 2.

Q: How much does radon mitigation cost in Marengo?

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

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

Marengo, WI Radon Facts

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

County Ashland County, WI

Zip Code 54855

Located in remote Ashland County in northern Wisconsin, Marengo currently lacks radon testing data for zip code 54855. The area's Precambrian bedrock and glacial deposits typical of the Lake Superior region can produce variable radon levels. Given Wisconsin's generally elevated radon potential, residents should test their homes regardless of the sparse population density.

8.67

pCi/L area average

Above EPA Action Level

Ashland County average: 8.67 pCi/L, based on 3 user-submitted tests across 3 cities in the county. No homeowner readings have been submitted for Marengo 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+

Marengo, WI 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 Marengo, WI

No homeowner tests have been submitted for Marengo 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
Ashland	11.5 mi	6.00 pCi/L	1
Clam Lake	17.1 mi	11.00 pCi/L	1
Drummond	22.2 mi	7.00 pCi/L	1
Butternut	31.8 mi	9.00 pCi/L	1
Hayward	37.6 mi	6.00 pCi/L	1
Winter	40.6 mi	4.00 pCi/L	1

Ashland County Radon Profile

The soils and bedrock of Ashland County place it in EPA Radon Zone 2, a moderate-risk classification with predicted indoor averages of 2 to 4 pCi/L. Homeowner-submitted tests from 3 cities in Ashland County average 8.67 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 Ashland County to test, as levels can differ between neighboring homes.

Radon FAQ for Marengo, WI

What EPA Radon Zone is Marengo in?

Marengo and the 54855 zip code are in Ashland 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 Marengo?

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

Radon mitigation in Marengo 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 Marengo?

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.