Glendale, CA Radon Levels

Q: What EPA Radon Zone is Glendale in?

Glendale is in Los Angeles County, EPA Zone 2.

Q: How much does radon mitigation cost in Glendale?

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

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

Glendale, CA Radon Facts

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

County Los Angeles County, CA

Zip Code 91201

Positioned in Los Angeles County within the Los Angeles Metro area, Glendale sits in the San Fernando Valley where diverse geological formations can create varying radon conditions across different neighborhoods. The area's mix of older homes and modern developments, many built on hillside locations with complex foundation systems, requires individual testing to assess radon risk. With testing data currently limited across Glendale's multiple zip codes (91201-91210), residents should conduct home radon testing to determine their specific exposure levels.

Glendale, 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 Glendale, CA

What EPA Radon Zone is Glendale in?

Glendale and the 91201 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 Glendale?

Radon mitigation in Glendale 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 Glendale?

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