Wilseyville, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Wilseyville in?

Wilseyville is in Calaveras County, EPA Zone 2.

Q: How much does radon mitigation cost in Wilseyville?

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

Calaveras County

EPA Zone 2

Mountain community Wilseyville in Calaveras County sits in California's Sierra Nevada foothills, where complex geology including granite intrusions can produce variable radon levels. Testing data remains limited for the 95257 zip code, making individual home testing advisable for residents.

Wilseyville, CA Radon Mitigation

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

Wilseyville, CA Radon Testing

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

Wilseyville Radon Facts

Key details about the radon risk profile for Wilseyville and the 95257 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Calaveras County, CA

Zip Code

95257

Predicted Screening Level

2–4 pCi/L (Zone 2)

Wilseyville and the 95257 zip code are located in Calaveras County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Wilseyville, CA

What EPA Radon Zone is Wilseyville in?

Wilseyville and the 95257 zip code are in Calaveras 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.

How much does radon mitigation cost in Wilseyville?

Radon mitigation in Wilseyville 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 Wilseyville?

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 California

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

City	Avg User Radon Level	Submissions
Los Angeles	7.83 pCi/L	6
Mammoth Lakes	10.80 pCi/L	5
San Jose	4.20 pCi/L	5
Rancho Palos Verdes	8.00 pCi/L	4
Woodland Hills	7.67 pCi/L	3
South Lake Tahoe	6.33 pCi/L	3
Palos Verdes Peninsula	6.00 pCi/L	3
Bishop	5.67 pCi/L	3
Sacramento	4.33 pCi/L	3
Oakland	3.33 pCi/L	3
Fresno	10.00 pCi/L	2
Davis	8.00 pCi/L	2
Palo Alto	6.50 pCi/L	2
Studio City	6.50 pCi/L	2
Menlo Park	5.00 pCi/L	2
Truckee	5.00 pCi/L	2
Walnut Creek	4.00 pCi/L	2
San Diego	3.50 pCi/L	2
San Francisco	3.50 pCi/L	2
Belmont	20.00 pCi/L	1