Novato, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Novato in?

Novato is in Marin County, EPA Zone 3.

Q: How much does radon mitigation cost in Novato?

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

Marin County

EPA Zone 3

Positioned in Marin County north of San Francisco, Novato sits on Franciscan Complex geology with relatively low radon potential typical of coastal California. While testing data across zip codes 94945, 94947, and 94949 is currently limited, the Mediterranean climate and geological conditions generally result in lower radon levels. However, individual home testing remains the only reliable way to determine actual radon concentrations.

Novato, CA Radon Mitigation

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

Novato, CA Radon Testing

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

Novato Radon Facts

Key details about the radon risk profile for Novato and the 94945 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Marin County, CA

Zip Code

94945

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Novato and the 94945 zip code are located in Marin 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 Novato, CA

What EPA Radon Zone is Novato in?

Novato and the 94945 zip code are in Marin 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 Novato?

Radon mitigation in Novato 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 Novato?

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