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Atascadero, CA Radon Levels

Check local Atascadero radon levels and find certified testing and mitigation professionals to keep your home safe


Atascadero, CA Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)
County San Luis Obispo County, CA
Zip Code 93422
Avg. User Level 5.00 pCi/L
User Tests 1

Located in San Luis Obispo County within the San Luis Obispo Metro area, Atascadero sits among rolling hills where granitic and sedimentary bedrock can contribute to radon formation. Testing data shows an average level of 5.0 pCi/L, which exceeds the EPA action threshold, indicating that homes in zip code 93422 should consider radon mitigation systems.

5.00
pCi/L average
Above EPA Action Level

Based on 1 user-submitted radon test for homes in Atascadero, CA. The EPA recommends taking action at or above 4.0 pCi/L.

0
4.0 EPA
10+

Atascadero, CA Radon Mitigation

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Atascadero, CA Radon Levels

User-submitted radon test readings from homes in the Atascadero area.

Radon LevelCityHome AgeFoundation
5 pCi/L Atascadero, CA 0-20 Years No Basement/All Slab

Have a radon test result for Atascadero? Submit your reading to help other homeowners.

Radon FAQ for Atascadero, CA

What is the average radon level in Atascadero, CA?
Based on 1 user-submitted test, the average radon level in Atascadero is 5.00 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.
What EPA Radon Zone is Atascadero in?
Atascadero and the 93422 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 Atascadero?
Radon mitigation in Atascadero 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 Atascadero?
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.

CityAvg User Radon LevelSubmissions
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