Hermosa Beach, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Hermosa Beach in?

Hermosa Beach is in Los Angeles County, EPA Zone 2.

Q: How much does radon mitigation cost in Hermosa Beach?

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

Los Angeles County

EPA Zone 2

This coastal Los Angeles County community in the 90254 area benefits from ocean proximity and sandy soils that typically reduce radon accumulation. Testing data remains limited for Hermosa Beach, though EPA Zone 2 designation suggests moderate potential. Homeowners should still consider radon testing, particularly in properties with enclosed lower levels or unique foundation characteristics.

Hermosa Beach, CA Radon Mitigation

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

Hermosa Beach, CA Radon Testing

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

Hermosa Beach Radon Facts

Key details about the radon risk profile for Hermosa Beach and the 90254 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Los Angeles County, CA

Zip Code

90254

Predicted Screening Level

2–4 pCi/L (Zone 2)

Hermosa Beach and the 90254 zip code are located in Los Angeles 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 Hermosa Beach, CA

What EPA Radon Zone is Hermosa Beach in?

Hermosa Beach and the 90254 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 Hermosa Beach?

Radon mitigation in Hermosa Beach 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 Hermosa Beach?

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