Gardena, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Gardena in?

Gardena is in Los Angeles County, EPA Zone 2.

Q: How much does radon mitigation cost in Gardena?

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

Located in Los Angeles County within the Los Angeles Metro, Gardena sits on coastal plain sediments that generally produce lower radon levels across zip codes 90247, 90248, and 90249. Testing data for the community remains limited, though residents should still consider radon testing as individual properties can vary. The city's predominantly post-war suburban housing stock with slab-on-grade foundations typically shows less radon accumulation than basement-equipped homes in other regions.

Gardena, CA Radon Mitigation

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

Gardena, CA Radon Testing

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

Gardena Radon Facts

Key details about the radon risk profile for Gardena and the 90247 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Los Angeles County, CA

Zip Code

90247

Predicted Screening Level

2–4 pCi/L (Zone 2)

Gardena and the 90247 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 Gardena, CA

What EPA Radon Zone is Gardena in?

Gardena and the 90247 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 Gardena?

Radon mitigation in Gardena 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 Gardena?

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