Gridley, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Gridley in?

Gridley is in Butte County, EPA Zone 3.

Q: How much does radon mitigation cost in Gridley?

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

Situated in Butte County within California's Central Valley, Gridley sits on alluvial fan deposits and valley fill sediments that typically result in low radon potential. Testing data for zip code 95948 remains limited, consistent with the EPA Zone 3 classification for this region. While radon risk is generally minimal, residents concerned about specific geological conditions or construction factors may still choose to test.

Gridley, CA Radon Mitigation

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

Gridley, CA Radon Testing

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

Gridley Radon Facts

Key details about the radon risk profile for Gridley and the 95948 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Butte County, CA

Zip Code

95948

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Gridley and the 95948 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 Gridley, CA

What EPA Radon Zone is Gridley in?

Gridley and the 95948 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 Gridley?

Radon mitigation in Gridley 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 Gridley?

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