Highland, CA Radon Levels
Check local Highland radon levels and find certified testing and mitigation professionals to keep your home safe
Highland, CA Radon Facts
Located in the San Bernardino foothills within San Bernardino County, Highland recorded an average radon level of 5.0 pCi/L from limited testing data. This level exceeds the EPA action level, suggesting homeowners in zip code 92346 should test their properties, particularly given the area's granitic mountain geology and mix of slab-on-grade and raised foundation homes.
Based on 1 user-submitted radon test for homes in Highland, CA. The EPA recommends taking action at or above 4.0 pCi/L.
Highland, CA Radon Mitigation
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Highland, CA Radon Levels
User-submitted radon test readings from homes in the Highland area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 5 pCi/L | Highland, CA | 51-99 Years | No Basement/All Crawl Space |
Have a radon test result for Highland? Submit your reading to help other homeowners.
Radon FAQ for Highland, CA
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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 |