Oroville, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Oroville in?

Oroville is in Butte County, EPA Zone 3.

Q: How much does radon mitigation cost in Oroville?

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

Butte County

EPA Zone 3

Located in Butte County within the Chico Metro area, Oroville sits in EPA Zone 3 where Northern California's Sierra Nevada foothills create higher radon potential than much of the state. Testing data for zip codes 95965 and 95966 remains limited, making individual home evaluation essential. The area's mixed soil conditions and varying foundation styles can influence radon levels significantly from property to property.

Oroville, CA Radon Mitigation

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

Oroville, CA Radon Testing

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

Oroville Radon Facts

Key details about the radon risk profile for Oroville and the 95965 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Butte County, CA

Zip Code

95965

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Oroville and the 95965 zip code are located in Butte 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 Oroville, CA

What EPA Radon Zone is Oroville in?

Oroville and the 95965 zip code are in Butte 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 Oroville?

Radon mitigation in Oroville 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 Oroville?

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