Malibu, CA Radon Levels

Q: What EPA Radon Zone is Malibu in?

Malibu is in Los Angeles County, EPA Zone 2.

Q: How much does radon mitigation cost in Malibu?

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

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

Malibu, CA Radon Facts

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

County Los Angeles County, CA

Zip Code 90263

Perched along the Pacific Coast in Los Angeles County, Malibu's unique geology combines marine sedimentary rocks with volcanic formations that can produce variable radon levels despite California's generally moderate radon potential. Testing data for this coastal community remains limited across zip codes 90263 and 90265, making professional testing important for homeowners. The area's distinctive hillside homes and ocean-facing properties may experience different radon accumulation patterns than inland locations.

Malibu, 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 Malibu, CA

What EPA Radon Zone is Malibu in?

Malibu and the 90263 zip code are in Los Angeles 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 Malibu?

Radon mitigation in Malibu 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 Malibu?

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