Ripon, WI Radon Levels

Q: What EPA Radon Zone is Ripon in?

Ripon is in Fond Du Lac County, EPA Zone 1.

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

No homeowner radon tests have been submitted for Ripon yet, so readings from the closest cities and the Fond Du Lac 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 Ripon?

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

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

Ripon, WI Radon Facts

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

County Fond Du Lac County, WI

Zip Code 54971

Part of Wisconsin's Fond Du Lac County in the Oshkosh Metro area, Ripon sits on glacial deposits that can create favorable conditions for radon accumulation throughout the region. The city's mix of historic homes and newer construction, many featuring full basements common in Wisconsin, provides enclosed spaces where radon can concentrate. With limited testing data available for zip code 54971, homeowners should prioritize radon testing given the area's glacial geology.

5.00

pCi/L area average

Above EPA Action Level

Fond Du Lac 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 Ripon 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+

Ripon, 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 Ripon, WI

No homeowner tests have been submitted for Ripon 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
Green Lake	6.3 mi	6.00 pCi/L	1
Fond Du Lac	16.9 mi	5.00 pCi/L	1
Oshkosh	18.4 mi	19.00 pCi/L	1
Wautoma	26.0 mi	15.00 pCi/L	1
Beaver Dam	26.5 mi	10.00 pCi/L	1
Pardeeville	32.4 mi	4.00 pCi/L	1
Fall River	32.6 mi	10.00 pCi/L	1
Juneau	33.2 mi	4.00 pCi/L	1

Fond Du Lac County Radon Profile

Because of its underlying geology, Fond Du Lac County is mapped as EPA Radon Zone 1 — the most elevated classification — where predicted indoor screening averages exceed 4 pCi/L. Homeowner-submitted tests from 1 city in Fond Du Lac 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. As the second leading cause of lung cancer in the U.S., radon warrants testing in every Fond Du Lac County home regardless of zone or a neighbor's results.

Radon FAQ for Ripon, WI

What EPA Radon Zone is Ripon in?

Ripon and the 54971 zip code are in Fond Du Lac 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 Ripon?

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

Radon mitigation in Ripon 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 Ripon?

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.