Los Angeles, CA Radon Mitigation and Testing
Home testing across Los Angeles County reveals an average radon level of 7.83 pCi/L, which significantly exceeds the EPA action threshold of 4.0 pCi/L. This sprawling metropolis sits atop complex geological formations including marine sediments and fault zones that can contribute to elevated radon concentrations. Given the diverse housing stock ranging from historic bungalows to modern high-rises, residents across all zip codes should prioritize radon testing and mitigation when necessary.
Based on 6 user-submitted radon tests for homes in Los Angeles, CA. The EPA recommends taking action at or above 4.0 pCi/L.
Los Angeles, CA Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
Los Angeles, CA Radon Testing
Finding qualified radon testing professionals is the first step toward protecting your home.
Los Angeles, California Radon Levels
User-submitted radon test readings from homes in the Los Angeles area.
| Radon Level | City | Home Age | Foundation | Submitted |
|---|---|---|---|---|
| 13 pCi/L | Los Angeles, CA | 51-99 Years | Partial Basement | Jan 2025 |
| 12 pCi/L | Los Angeles, CA | 21-50 Years | — | May 2024 |
| 9 pCi/L | Los Angeles, CA | 51-99 Years | No Basement/All Crawl Space | Sep 2022 |
| 3 pCi/L | Los Angeles, CA | 21-50 Years | No Basement/All Crawl Space | Dec 2020 |
| 4 pCi/L | Los Angeles, CA | 51-99 Years | Full Basement | Jul 2019 |
Have a radon test result for Los Angeles? Submit your reading to help other homeowners.
Los Angeles Radon Facts
Key details about the radon risk profile for Los Angeles and the 90001 zip code area.
Los Angeles and the 90001 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 Los Angeles, CA
What is the average radon level in Los Angeles, CA?
What EPA Radon Zone is Los Angeles in?
How much does radon mitigation cost in Los Angeles?
Should I test for radon if I'm buying a home in Los Angeles?
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 |