Washington Island, WI Radon Mitigation and Testing

Q: What EPA Radon Zone is Washington Island in?

Washington Island is in Door County, EPA Zone 1.

Q: How much does radon mitigation cost in Washington Island?

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

Door County

EPA Zone 1

Located in Door County off Wisconsin's Door Peninsula, this unique island community sits on dolomite bedrock that can produce elevated radon levels. With limited testing data available for zip code 54246, island residents should conduct radon testing despite their isolated location. The area's older housing stock and the potential for radon accumulation in basement spaces make testing particularly important for year-round residents.

Washington Island, WI Radon Mitigation

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

Washington Island, WI Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Washington Island Radon Facts

Key details about the radon risk profile for Washington Island and the 54246 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Door County, WI

Zip Code

54246

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Washington Island and the 54246 zip code are located in Door County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Washington Island, WI

What EPA Radon Zone is Washington Island in?

Washington Island and the 54246 zip code are in Door 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.

How much does radon mitigation cost in Washington Island?

Radon mitigation in Washington Island 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 Washington Island?

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.

Most Active Radon Markets in Wisconsin

Cities with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
Milwaukee	10.00 pCi/L	3
Prairie Du Chien	10.00 pCi/L	2
Stevens Point	5.50 pCi/L	2
Menomonie	10.00 pCi/L	1
Delavan	6.00 pCi/L	1
Shawano	No submissions	0
Sturgeon Bay	No submissions	0