Brentwood, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Brentwood in?

Brentwood is in Contra Costa County, EPA Zone 2.

Q: How much does radon mitigation cost in Brentwood?

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

Contra Costa County

EPA Zone 2

Located in Contra Costa County within the San Francisco Bay Area, Brentwood has experienced rapid residential growth with many newer homes built on alluvial soils from the Sacramento-San Joaquin Delta. Radon testing data for zip code 94513 remains limited, despite the area's EPA Zone 2 classification indicating low-to-moderate radon potential. Homeowners should test their properties to determine actual radon levels in their specific location.

Brentwood, CA Radon Mitigation

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

Brentwood, CA Radon Testing

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

Brentwood Radon Facts

Key details about the radon risk profile for Brentwood and the 94513 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Contra Costa County, CA

Zip Code

94513

Predicted Screening Level

2–4 pCi/L (Zone 2)

Brentwood and the 94513 zip code are located in Contra Costa 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 Brentwood, CA

What EPA Radon Zone is Brentwood in?

Brentwood and the 94513 zip code are in Contra Costa 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 Brentwood?

Radon mitigation in Brentwood 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 Brentwood?

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