Cedar Glen, CA Radon Levels
Check local Cedar Glen radon levels and find certified testing and mitigation professionals to keep your home safe
Cedar Glen, CA Radon Facts
EPA Radon Zone
Unknown
Unknown
County
San Bernardino County, CA
Zip Code
92321
Nestled in the San Bernardino Mountains of San Bernardino County, Cedar Glen reported an exceptionally high radon reading of 11.0 pCi/L, significantly exceeding the EPA action level. The community's mountainous granite geology and elevation in zip code 92321 contribute to these elevated levels within the broader Riverside metro region. Mountain communities often experience higher radon concentrations due to uranium-bearing granite formations and temperature-driven soil gas movement.
Cedar Glen, CA Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
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Radon FAQ for Cedar Glen, CA
What EPA Radon Zone is Cedar Glen in?
Cedar Glen and the 92321 zip code are in San Bernardino County, which has an EPA assigned Radon Zone of Unknown. A zone of Unknown does not have sufficient data for classification.
How much does radon mitigation cost in Cedar Glen?
Radon mitigation in Cedar Glen 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 Cedar Glen?
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 |