Mason, WI Radon Levels

Q: What EPA Radon Zone is Mason in?

Mason is in Bayfield County, EPA Zone 2.

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

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

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

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

Mason, WI Radon Facts

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

County Bayfield County, WI

Zip Code 54856

Northern Wisconsin's Bayfield County encompasses diverse geological terrain, from Precambrian bedrock to glacial lake deposits that create variable radon conditions across this forested region. While testing data for zip code 54856 is currently unavailable, the area's complex geology warrants attention to potential radon risks. Residents should prioritize testing, especially in homes with basements or lower-level living spaces that are common in this region's seasonal and year-round housing stock.

7.00

pCi/L area average

Above EPA Action Level

Bayfield County average: 7.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Mason 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+

Mason, 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 Mason, WI

No homeowner tests have been submitted for Mason 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
Drummond	11.5 mi	7.00 pCi/L	1
Ashland	20.4 mi	6.00 pCi/L	1
Clam Lake	22.0 mi	11.00 pCi/L	1
Hayward	34.2 mi	6.00 pCi/L	1
Minong	41.4 mi	5.00 pCi/L	1
Winter	42.3 mi	4.00 pCi/L	1
Butternut	42.6 mi	9.00 pCi/L	1

Bayfield County Radon Profile

Bayfield 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 Bayfield County average 7.00 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 Bayfield County.

Radon FAQ for Mason, WI

What EPA Radon Zone is Mason in?

Mason and the 54856 zip code are in Bayfield 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 Mason?

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

Radon mitigation in Mason 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 Mason?

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.