Princeton, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Princeton in?

Princeton is in Glenn County, EPA Zone 3.

Q: How much does radon mitigation cost in Princeton?

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

Glenn County

EPA Zone 3

Princeton occupies Glenn County in California's Sacramento Valley, where alluvial deposits and Great Valley geology typically create low radon conditions across the region. While testing data for ZIP code 95970 remains limited, the area's EPA Zone 3 classification reflects the generally lower risk common to Central Valley communities. However, variations in soil composition and individual home construction details can still create localized radon concerns worth investigating.

Princeton, CA Radon Mitigation

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

Princeton, CA Radon Testing

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

Princeton Radon Facts

Key details about the radon risk profile for Princeton and the 95970 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Glenn County, CA

Zip Code

95970

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Princeton and the 95970 zip code are located in Glenn 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 Princeton, CA

What EPA Radon Zone is Princeton in?

Princeton and the 95970 zip code are in Glenn 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 Princeton?

Radon mitigation in Princeton 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 Princeton?

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