Farmington, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Farmington in?

Farmington is in Stanislaus County, EPA Zone 3.

Q: How much does radon mitigation cost in Farmington?

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

Stanislaus County

EPA Zone 3

Located in California's Central Valley within Stanislaus County and the Modesto metro area, Farmington sits in EPA Zone 3 where radon levels are typically moderate to low. The area's alluvial soil conditions and predominantly single-story construction patterns create specific radon risk profiles different from basement-heavy regions. Testing data remains limited for this community, though residents may still benefit from radon assessment as part of comprehensive home safety evaluation.

Farmington, CA Radon Mitigation

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

Farmington, CA Radon Testing

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

Farmington Radon Facts

Key details about the radon risk profile for Farmington and the 95230 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Stanislaus County, CA

Zip Code

95230

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Farmington and the 95230 zip code are located in Stanislaus 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 Farmington, CA

What EPA Radon Zone is Farmington in?

Farmington and the 95230 zip code are in Stanislaus 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 Farmington?

Radon mitigation in Farmington 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 Farmington?

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