Fremont, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Fremont in?

Fremont is in Alameda County, EPA Zone 2.

Q: How much does radon mitigation cost in Fremont?

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

Alameda County

EPA Zone 2

This Alameda County community in the San Francisco metro area sits on alluvial deposits of the East Bay, where radon concentrations are typically moderate. Testing data for zip code 94536 remains limited, though California's varied geology can produce inconsistent radon levels across neighboring properties. Given the EPA Zone 2 classification, professional radon testing provides valuable information for Fremont homeowners seeking to ensure optimal indoor air quality.

Fremont, CA Radon Mitigation

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

Fremont, CA Radon Testing

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

Fremont Radon Facts

Key details about the radon risk profile for Fremont and the 94536 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Alameda County, CA

Zip Code

94536

Predicted Screening Level

2–4 pCi/L (Zone 2)

Fremont and the 94536 zip code are located in Alameda County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Fremont, CA

What EPA Radon Zone is Fremont in?

Fremont and the 94536 zip code are in Alameda County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

How much does radon mitigation cost in Fremont?

Radon mitigation in Fremont 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 Fremont?

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