Thousand Oaks, CA Radon Mitigation and Testing
Thousand Oaks in Ventura County sits within the Conejo Valley, where sedimentary bedrock and coastal formations create generally lower radon potential typical of Southern California. Recent testing shows an average radon level of 5.0 pCi/L, which exceeds the EPA action level of 4.0 pCi/L and warrants mitigation. The city's predominantly single-family homes built from the 1960s onward typically feature slab-on-grade construction, though elevated readings can still occur in certain geological pockets.
Based on 1 user-submitted radon test for homes in Thousand Oaks, CA. The EPA recommends taking action at or above 4.0 pCi/L.
Thousand Oaks, CA Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
Thousand Oaks, CA Radon Testing
Finding qualified radon testing professionals is the first step toward protecting your home.
Thousand Oaks, California Radon Levels
User-submitted radon test readings from homes in the Thousand Oaks area.
| Radon Level | City | Home Age | Foundation | Submitted |
|---|---|---|---|---|
| 5 pCi/L | Thousand Oaks, CA | 51-99 Years | No Basement/All Slab | Oct 2023 |
Have a radon test result for Thousand Oaks? Submit your reading to help other homeowners.
Thousand Oaks Radon Facts
Key details about the radon risk profile for Thousand Oaks and the 91360 zip code area.
Thousand Oaks and the 91360 zip code are located in Ventura County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.
Radon FAQ for Thousand Oaks, 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 |