Mountain Ranch, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Mountain Ranch in?

Mountain Ranch is in Calaveras County, EPA Zone 2.

Q: How much does radon mitigation cost in Mountain Ranch?

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

Calaveras County

EPA Zone 2

Positioned in Calaveras County in California's Sierra Nevada foothills, Mountain Ranch sits over metamorphic bedrock where gold-bearing quartz veins and granite intrusions can contribute to radon accumulation. Testing data for zip code 95246 remains limited, making professional radon assessment essential for homeowners in this historic mining region. The area's mix of rural properties and recreational homes, many with unique foundation systems adapted to sloping terrain, should be tested regardless of construction era.

Mountain Ranch, CA Radon Mitigation

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

Mountain Ranch, CA Radon Testing

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

Mountain Ranch Radon Facts

Key details about the radon risk profile for Mountain Ranch and the 95246 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Calaveras County, CA

Zip Code

95246

Predicted Screening Level

2–4 pCi/L (Zone 2)

Mountain Ranch and the 95246 zip code are located in Calaveras County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Mountain Ranch, CA

What EPA Radon Zone is Mountain Ranch in?

Mountain Ranch and the 95246 zip code are in Calaveras County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

How much does radon mitigation cost in Mountain Ranch?

Radon mitigation in Mountain Ranch 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 Mountain Ranch?

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