Coronado, CA Radon Levels
Check local Coronado radon levels and find certified testing and mitigation professionals to keep your home safe
Coronado, CA Radon Facts
EPA Radon Zone
Zone 3 — Low Risk
< 2.0 pCi/L (Zone 3)
County
San Diego County, CA
Zip Code
92118
Located on a narrow peninsula in San Diego County within the San Diego Metro, Coronado sits on beach sands and marine deposits that typically produce minimal radon. Available testing data for zip code 92118 is sparse, though the coastal barrier setting generally correlates with lower radon potential. Most properties here feature slab-on-grade or elevated foundations due to the sandy soil and coastal conditions, which typically reduces radon accumulation concerns.
Coronado, 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 Coronado, CA
What EPA Radon Zone is Coronado in?
Coronado and the 92118 zip code are in San Diego County, which has an EPA assigned Radon Zone of 3. A zone of 3 predicts an average indoor radon screening level less than 2 pCi/L.
How much does radon mitigation cost in Coronado?
Radon mitigation in Coronado 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 Coronado?
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 |