Santa Monica, CA Radon Mitigation and Testing
This iconic beachside city in Los Angeles County has recorded an average radon level of 5.0 pCi/L across zip codes 90401-90405, which exceeds the EPA action level of 4.0 pCi/L. Despite Santa Monica's coastal location in EPA Zone 2, the underlying marine terrace deposits and urban housing density can create pockets of elevated radon concentration. Residents should prioritize testing, especially in multi-story buildings and homes with basements or enclosed lower levels where radon accumulation is most likely.
Based on 1 user-submitted radon test for homes in Santa Monica, CA. The EPA recommends taking action at or above 4.0 pCi/L.
Santa Monica, CA Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
Santa Monica, CA Radon Testing
Finding qualified radon testing professionals is the first step toward protecting your home.
Santa Monica, California Radon Levels
User-submitted radon test readings from homes in the Santa Monica area.
| Radon Level | City | Home Age | Foundation | Submitted |
|---|---|---|---|---|
| 5 pCi/L | Santa Monica, CA | 51-99 Years | No Basement/All Crawl Space | Mar 2021 |
Have a radon test result for Santa Monica? Submit your reading to help other homeowners.
Santa Monica Radon Facts
Key details about the radon risk profile for Santa Monica and the 90401 zip code area.
Santa Monica and the 90401 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 Santa Monica, CA
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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 |