Davis, CA Radon Mitigation and Testing

Q: What is the average radon level in Davis, CA?

Based on 2 user-submitted tests, the average radon level is 8.00 pCi/L.

Q: What EPA Radon Zone is Davis in?

Davis is in Yolo County, EPA Zone 3.

Q: How much does radon mitigation cost in Davis?

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

Avg: 8.00 pCi/L

Yolo County

EPA Zone 3

2 user tests

Home to UC Davis and located in Yolo County, this Sacramento Metro community has recorded an average radon level of 8.0 pCi/L, which significantly exceeds the EPA action threshold and requires immediate attention. The area's Great Valley geology features alluvial deposits over marine sedimentary rocks that can contain uranium-bearing formations. Residents across zip codes 95616 and 95618 should prioritize radon testing and mitigation, especially in homes with basements or ground-contact living spaces.

8.00

pCi/L average

Above EPA Action Level

Based on 2 user-submitted radon tests for homes in Davis, CA. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Davis, CA Radon Mitigation

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

Davis, CA Radon Testing

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

Davis, California Radon Levels

User-submitted radon test readings from homes in the Davis area.

Radon Level	City	Home Age	Foundation	Submitted
7 pCi/L	Davis, CA	21-50 Years	No Basement/All Slab	Sep 2023
9 pCi/L	Davis, CA	21-50 Years	No Basement/All Slab	Jan 2020

Have a radon test result for Davis? Submit your reading to help other homeowners.

Davis Radon Facts

Key details about the radon risk profile for Davis and the 95616 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Yolo County, CA

Zip Code

95616

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Avg. User Submitted Level

8.00 pCi/L

User Tests Submitted

Davis and the 95616 zip code are located in Yolo 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 Davis, CA

What is the average radon level in Davis, CA?

Based on 2 user-submitted tests, the average radon level in Davis is 8.00 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is Davis in?

Davis and the 95616 zip code are in Yolo 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 Davis?

Radon mitigation in Davis 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 Davis?

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