Comptche, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Comptche in?

Comptche is in Mendocino County, EPA Zone 3.

Q: How much does radon mitigation cost in Comptche?

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

Mendocino County

EPA Zone 3

Hidden in Mendocino County's coastal mountains, Comptche sits over the Franciscan Complex rock formations that can contain uranium-bearing minerals contributing to radon production. The rural community's housing includes older homes, cabins, and vineyard properties, many with varied foundation types adapted to the hilly terrain. With radon testing data for zip code 95427 currently unavailable, property owners should consider professional testing, as California's complex geology can create unexpected radon hotspots.

Comptche, CA Radon Mitigation

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

Comptche, CA Radon Testing

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

Comptche Radon Facts

Key details about the radon risk profile for Comptche and the 95427 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Mendocino County, CA

Zip Code

95427

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Comptche and the 95427 zip code are located in Mendocino County, which has an EPA assigned Radon Zone of 3. A radon zone of 3 predicts an average indoor radon screening level less than 2 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Comptche, CA

What EPA Radon Zone is Comptche in?

Comptche and the 95427 zip code are in Mendocino County, which has an EPA assigned Radon Zone of 3. A zone of 3 predicts an average indoor radon screening level less than 2 pCi/L.

How much does radon mitigation cost in Comptche?

Radon mitigation in Comptche 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 Comptche?

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