Casco, WI Radon Levels

Q: What EPA Radon Zone is Casco in?

Casco is in Kewaunee County, EPA Zone 2.

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

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

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

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

Casco, WI Radon Facts

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

County Kewaunee County, WI

Zip Code 54205

Situated in Kewaunee County within the Green Bay Metro area, Casco sits atop dolomite bedrock and glacial till deposits that can produce moderate radon concentrations. The community's agricultural character includes farmsteads and rural homes, many with basement foundations that readily trap radon gas from underlying soils. Given Wisconsin's variable radon levels and sparse testing data for this area, residents should prioritize professional radon testing.

5.00

pCi/L area average

Above EPA Action Level

Kewaunee County average: 5.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Casco 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+

Casco, WI Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

Need Radon Mitigation or Testing in Casco?

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Radon Readings Near Casco, WI

No homeowner tests have been submitted for Casco 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
Algoma	8.3 mi	5.00 pCi/L	1
Green Bay	20.3 mi	4.00 pCi/L	1
Pulaski	31.9 mi	4.00 pCi/L	1
Greenville	49.1 mi	7.00 pCi/L	1
New Holstein	49.8 mi	7.00 pCi/L	1

Kewaunee County Radon Profile

Kewaunee 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. Homeowner-submitted tests from 1 city in Kewaunee County average 5.00 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 Kewaunee County.

Radon FAQ for Casco, WI

What EPA Radon Zone is Casco in?

Casco and the 54205 zip code are in Kewaunee 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 Casco?

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

Radon mitigation in Casco 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 Casco?

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.