Ukiah, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Ukiah in?

Ukiah is in Mendocino County, EPA Zone 3.

Q: How much does radon mitigation cost in Ukiah?

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

Located in Mendocino County within Northern California's wine country, Ukiah sits in a valley surrounded by Franciscan Formation rocks that typically produce lower radon levels across the region. Testing data for the 95482 area is currently limited, though California's generally lower radon potential suggests modest risk. The area's housing mix includes both historic Victorian-era homes and newer construction, with many properties featuring crawl space or slab-on-grade foundations.

Ukiah, CA Radon Mitigation

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

Ukiah, CA Radon Testing

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

Ukiah Radon Facts

Key details about the radon risk profile for Ukiah and the 95482 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Mendocino County, CA

Zip Code

95482

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Ukiah and the 95482 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 Ukiah, CA

What EPA Radon Zone is Ukiah in?

Ukiah and the 95482 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 Ukiah?

Radon mitigation in Ukiah 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 Ukiah?

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