Gualala, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Gualala in?

Gualala is in Mendocino County, EPA Zone 3.

Q: How much does radon mitigation cost in Gualala?

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

Mendocino County

EPA Zone 3

Perched on coastal bluffs in Mendocino County where the Gualala River meets the Pacific, this scenic community sits on marine terraces over the San Andreas Fault zone. The area's housing includes coastal cottages, vacation homes, and retreat centers, many built on pier and beam foundations to accommodate the sloping terrain. Though radon testing data for zip code 95445 is currently limited, the complex coastal geology and varied foundation types make individual home testing advisable.

Gualala, CA Radon Mitigation

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

Gualala, CA Radon Testing

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

Gualala Radon Facts

Key details about the radon risk profile for Gualala and the 95445 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Mendocino County, CA

Zip Code

95445

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Gualala and the 95445 zip code are located in Mendocino 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 Gualala, CA

What EPA Radon Zone is Gualala in?

Gualala and the 95445 zip code are in Mendocino 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 Gualala?

Radon mitigation in Gualala 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 Gualala?

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