Menlo Park, CA Radon Mitigation and Testing
Located in San Mateo County within the San Francisco metro area, Menlo Park has recorded an average radon level of 4.0 pCi/L, which meets the EPA action level threshold. This Silicon Valley community sits in EPA Zone 2, where diverse geological formations create moderate radon potential. Homeowners in zip code 94025 should consider testing, as individual readings can vary significantly based on specific soil conditions and home characteristics.
Based on 2 user-submitted radon tests for homes in Menlo Park, CA. The EPA recommends taking action at or above 4.0 pCi/L.
Menlo Park, CA Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
Menlo Park, CA Radon Testing
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Menlo Park, California Radon Levels
User-submitted radon test readings from homes in the Menlo Park area.
| Radon Level | City | Home Age | Foundation | Submitted |
|---|---|---|---|---|
| 6 pCi/L | Menlo Park, CA | 51-99 Years | No Basement/All Crawl Space | Feb 2026 |
| 4 pCi/L | Menlo Park, CA | 21-50 Years | No Basement/All Crawl Space | Jul 2019 |
Have a radon test result for Menlo Park? Submit your reading to help other homeowners.
Menlo Park Radon Facts
Key details about the radon risk profile for Menlo Park and the 94025 zip code area.
Menlo Park and the 94025 zip code are located in San Mateo 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 Menlo Park, 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 |