San Luis Obispo, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is San Luis Obispo in?

San Luis Obispo is in San Luis Obispo County, EPA Zone 2.

Q: How much does radon mitigation cost in San Luis Obispo?

Radon mitigation typically costs between $800 and $2,000. Most standard systems fall in the $1,000-$1,500 range.

San Luis Obispo County

EPA Zone 2

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.

San Luis Obispo, CA Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

San Luis Obispo Radon Facts

Key details about the radon risk profile for San Luis Obispo and the 93401 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

San Luis Obispo County, CA

Zip Code

93401

Predicted Screening Level

2–4 pCi/L (Zone 2)

San Luis Obispo and the 93401 zip code are located in San Luis Obispo County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

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 with the most user-submitted radon test data in the state.

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
Woodland Hills	7.67 pCi/L	3
South Lake Tahoe	6.33 pCi/L	3
Palos Verdes Peninsula	6.00 pCi/L	3
Bishop	5.67 pCi/L	3
Sacramento	4.33 pCi/L	3
Oakland	3.33 pCi/L	3
Fresno	10.00 pCi/L	2
Davis	8.00 pCi/L	2
Palo Alto	6.50 pCi/L	2
Studio City	6.50 pCi/L	2
Menlo Park	5.00 pCi/L	2
Truckee	5.00 pCi/L	2
Walnut Creek	4.00 pCi/L	2
San Diego	3.50 pCi/L	2
San Francisco	3.50 pCi/L	2
Belmont	20.00 pCi/L	1