Santa Maria, CA Radon Levels
Check local Santa Maria radon levels and find certified testing and mitigation professionals to keep your home safe
Santa Maria, CA Radon Facts
EPA Radon Zone
Zone 1 — High Risk
> 4.0 pCi/L (Zone 1)
County
Santa Barbara County, CA
Zip Code
93454
Located in Santa Barbara County within the Santa Maria Valley, this agricultural community sits in EPA Zone 1 where radon levels are typically low due to coastal marine sediments and alluvial soils. Testing data for zip codes 93454, 93455, and 93458 is currently limited, making individual home testing especially important for residents. The area's mix of older ranch-style homes and newer developments means foundation types vary, and enclosed spaces can still accumulate radon regardless of regional geology.
Santa Maria, CA Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
Need Radon Mitigation or Testing in Santa Maria?
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Radon FAQ for Santa Maria, CA
What EPA Radon Zone is Santa Maria in?
Santa Maria and the 93454 zip code are in Santa Barbara County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.
How much does radon mitigation cost in Santa Maria?
Radon mitigation in Santa Maria 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 Santa Maria?
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 |