Los Altos, CA Radon Levels
Check local Los Altos radon levels and find certified testing and mitigation professionals to keep your home safe
Los Altos, CA Radon Facts
EPA Radon Zone
Zone 2 — Moderate Risk
2–4 pCi/L (Zone 2)
County
Santa Clara County, CA
Zip Code
94022
Within the San Jose Metro in Santa Clara County, Los Altos at zip code 94022 sits in California's Bay Area where geological conditions typically produce moderate radon potential. Testing data remains unavailable for this affluent community, though individual home testing provides the most accurate assessment of radon levels. California's diverse geology and the area's mix of older and newer housing stock make professional radon testing a worthwhile consideration for homeowners.
Los Altos, CA Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
Need Radon Mitigation or Testing in Los Altos?
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Radon FAQ for Los Altos, CA
What EPA Radon Zone is Los Altos in?
Los Altos and the 94022 zip code are in Santa Clara 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 Los Altos?
Radon mitigation in Los Altos 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 Los Altos?
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 in California with the most user-submitted radon test data, ranked by number of submissions.
| 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 |
| Bishop | 6.25 pCi/L | 4 |
| Oakland | 5.00 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 |
| Sacramento | 4.33 pCi/L | 3 |