Pleasant Hill, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Pleasant Hill in?

Pleasant Hill is in Contra Costa County, EPA Zone 2.

Q: How much does radon mitigation cost in Pleasant Hill?

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

Part of the San Francisco Metro area, Pleasant Hill in Contra Costa County sits in California's East Bay region where sedimentary geology typically produces moderate radon potential as reflected in its EPA Zone 2 classification. While current radon testing data for 94523 is limited, the area's geological conditions and Mediterranean-style housing with minimal basement construction generally result in lower radon concentrations. Still, homeowners should consider testing to establish their property's specific radon profile.

Pleasant Hill, CA Radon Mitigation

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

Pleasant Hill, CA Radon Testing

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

Pleasant Hill Radon Facts

Key details about the radon risk profile for Pleasant Hill and the 94523 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Contra Costa County, CA

Zip Code

94523

Predicted Screening Level

2–4 pCi/L (Zone 2)

Pleasant Hill and the 94523 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 Pleasant Hill, CA

What EPA Radon Zone is Pleasant Hill in?

Pleasant Hill and the 94523 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 Pleasant Hill?

Radon mitigation in Pleasant Hill 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 Pleasant Hill?

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