Larsen, WI Radon Levels

Q: What EPA Radon Zone is Larsen in?

Larsen is in Winnebago County, EPA Zone 2.

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

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

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

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

Larsen, WI Radon Facts

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

County Winnebago County, WI

Zip Code 54947

Found in Winnebago County within the Oshkosh Metro area, Larsen (54947) sits on Wisconsin's glacial terrain where till deposits over limestone bedrock can influence radon concentrations. With testing data currently unavailable for this small community, residents should pursue individual home measurement. The area's typical basement construction and underlying geology make radon testing a prudent step for local homeowners.

19.00

pCi/L area average

Above EPA Action Level

Winnebago County average: 19.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Larsen 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+

Larsen, 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 Larsen, WI

No homeowner tests have been submitted for Larsen 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
Greenville	10.6 mi	7.00 pCi/L	1
Oshkosh	14.3 mi	19.00 pCi/L	1
Green Lake	27.9 mi	6.00 pCi/L	1
Wautoma	29.7 mi	15.00 pCi/L	1
Fond Du Lac	30.9 mi	5.00 pCi/L	1
New Holstein	34.8 mi	7.00 pCi/L	1
Pulaski	38.4 mi	4.00 pCi/L	1
Green Bay	39.7 mi	4.00 pCi/L	1

Winnebago County Radon Profile

The soils and bedrock of Winnebago 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 1 city in Winnebago County average 19.00 pCi/L across 1 test — 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 Winnebago County to test, as levels can differ between neighboring homes.

Radon FAQ for Larsen, WI

What EPA Radon Zone is Larsen in?

Larsen and the 54947 zip code are in Winnebago 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 Larsen?

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

Radon mitigation in Larsen 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 Larsen?

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.