San Luis Obispo, CA Radon Levels
Check local San Luis Obispo radon levels and find certified testing and mitigation professionals to keep your home safe
San Luis Obispo, CA Radon Facts
EPA Radon Zone
Zone 2 — Moderate Risk
2–4 pCi/L (Zone 2)
County
San Luis Obispo County, CA
Zip Code
93401
Located in San Luis Obispo County along California's Central Coast, San Luis Obispo sits within a valley surrounded by hills containing diverse geological formations. Radon testing data for zip code 93401 is currently insufficient to establish reliable local averages. The city's mix of historic buildings, college housing, and suburban developments presents varied foundation types where radon levels can differ significantly, making individual home testing advisable.
San Luis Obispo, 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 San Luis Obispo, CA
What EPA Radon Zone is San Luis Obispo in?
San Luis Obispo and the 93401 zip code are in San Luis Obispo 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 San Luis Obispo?
Radon mitigation in San Luis Obispo 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 San Luis Obispo?
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 |