Stanford, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Stanford in?

Stanford is in Santa Clara County, EPA Zone 2.

Q: How much does radon mitigation cost in Stanford?

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

Santa Clara County

EPA Zone 2

Home to Stanford University in Santa Clara County, this San Jose Metro community sits on alluvial soils and sedimentary formations typical of California's Bay Area landscape. The area features a unique mix of university housing, faculty residences, and research facilities, many built with various foundation types over different decades. With no current radon testing data for zip code 94305, residents and property managers should consider professional testing to establish baseline readings.

Stanford, CA Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

Stanford, CA Radon Testing

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

Stanford Radon Facts

Key details about the radon risk profile for Stanford and the 94305 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Santa Clara County, CA

Zip Code

94305

Predicted Screening Level

2–4 pCi/L (Zone 2)

Stanford and the 94305 zip code are located in Santa Clara 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 Stanford, CA

What EPA Radon Zone is Stanford in?

Stanford and the 94305 zip code are in Santa Clara 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 Stanford?

Radon mitigation in Stanford 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 Stanford?

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