Folsom, CA Radon Mitigation and Testing

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

Based on 1 user-submitted tests, the average radon level is 3.00 pCi/L.

Q: What EPA Radon Zone is Folsom in?

Folsom is in Sacramento County, EPA Zone 3.

Q: How much does radon mitigation cost in Folsom?

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

Avg: 3.00 pCi/L

Sacramento County

EPA Zone 3

1 user test

Folsom in Sacramento County shows an average radon level of 3.0 pCi/L, which falls within the EPA's recommended range but still warrants continued monitoring and testing. This Sacramento Metro community sits within California's Central Valley, where granitic bedrock from the nearby Sierra Nevada foothills can create variable radon conditions. The area's mix of older ranch-style homes and newer subdivisions creates diverse foundation types that can affect radon entry patterns.

3.00

pCi/L average

Below EPA Action Level

Based on 1 user-submitted radon test for homes in Folsom, CA. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Folsom, CA Radon Mitigation

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

Folsom, CA Radon Testing

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

Folsom, California Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
3 pCi/L	Folsom, CA	21-50 Years	No Basement/All Crawl Space	Aug 2025

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

Folsom Radon Facts

Key details about the radon risk profile for Folsom and the 95630 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Sacramento County, CA

Zip Code

95630

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Avg. User Submitted Level

3.00 pCi/L

User Tests Submitted

Folsom and the 95630 zip code are located in Sacramento 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 Folsom, CA

What is the average radon level in Folsom, CA?

Based on 1 user-submitted test, the average radon level in Folsom is 3.00 pCi/L. This is below the EPA's recommended action level of 4.0 pCi/L. However, we recommend all homes be tested regardless of your neighbor's results.

What EPA Radon Zone is Folsom in?

Folsom and the 95630 zip code are in Sacramento 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 Folsom?

Radon mitigation in Folsom 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 Folsom?

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