Annapolis, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Annapolis in?

Annapolis is in Sonoma County, EPA Zone 3.

Q: How much does radon mitigation cost in Annapolis?

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

Sonoma County

EPA Zone 3

Located in Sonoma County within the Santa Rosa Metro area, Annapolis sits among Northern California's coastal mountains where the region's diverse geological formations typically produce lower radon levels. The rural community's housing includes both historic structures and newer mountain properties, often built with varying foundation types suited to the terrain. Testing data for the 95412 area remains limited, so residents should consider professional radon testing to establish baseline levels for their properties.

Annapolis, CA Radon Mitigation

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

Annapolis, CA Radon Testing

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

Annapolis Radon Facts

Key details about the radon risk profile for Annapolis and the 95412 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Sonoma County, CA

Zip Code

95412

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Annapolis and the 95412 zip code are located in Sonoma County, which has an EPA assigned Radon Zone of 3. A radon zone of 3 predicts an average indoor radon screening level less than 2 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Annapolis, CA

What EPA Radon Zone is Annapolis in?

Annapolis and the 95412 zip code are in Sonoma County, which has an EPA assigned Radon Zone of 3. A zone of 3 predicts an average indoor radon screening level less than 2 pCi/L.

How much does radon mitigation cost in Annapolis?

Radon mitigation in Annapolis 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 Annapolis?

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