Philo, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Philo in?

Philo is in Mendocino County, EPA Zone 3.

Q: How much does radon mitigation cost in Philo?

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

Situated in Mendocino County's scenic wine country, Philo in zip code 95466 currently has limited radon testing data available. The area's varied geology, from coastal formations to inland valleys, creates diverse radon potential across different neighborhoods. Given California's mixed geological conditions and diverse housing types, individual home testing remains the most reliable approach for residents.

Philo, CA Radon Mitigation

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

Philo, CA Radon Testing

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

Philo Radon Facts

Key details about the radon risk profile for Philo and the 95466 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Mendocino County, CA

Zip Code

95466

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Philo and the 95466 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 Philo, CA

What EPA Radon Zone is Philo in?

Philo and the 95466 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 Philo?

Radon mitigation in Philo 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 Philo?

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