Berkeley, CA Radon Levels

Q: What EPA Radon Zone is Berkeley in?

Berkeley is in Alameda County, EPA Zone 2.

Q: How much does radon mitigation cost in Berkeley?

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

Check local Berkeley radon levels and find certified testing and mitigation professionals to keep your home safe

Berkeley, CA Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Alameda County, CA

Zip Code 94702

Situated on San Francisco Bay in Alameda County within the San Francisco Metro, Berkeley lies in EPA zone 2 where California's complex geology and Mediterranean climate typically produce moderate radon levels. Testing data for zip code 94702 is currently limited, though the area's diverse housing stock from Victorian homes to modern construction can show varying radon patterns. The region's earthquake-prone geology and older homes with crawl spaces or partial basements may experience different radon entry dynamics than typical California construction.

Berkeley, CA Radon Mitigation

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

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Radon FAQ for Berkeley, CA

What EPA Radon Zone is Berkeley in?

Berkeley and the 94702 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 Berkeley?

Radon mitigation in Berkeley 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 Berkeley?

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 in California with the most user-submitted radon test data, ranked by number of submissions.

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
Bishop	6.25 pCi/L	4
Oakland	5.00 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
Sacramento	4.33 pCi/L	3