Mountain Ranch, CA Radon Levels

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.

Check local Mountain Ranch radon levels and find certified testing and mitigation professionals to keep your home safe

Mountain Ranch, CA Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Calaveras County, CA

Zip Code 95246

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.

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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 in California with the most user-submitted radon test data, ranked by number of submissions.

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
Bishop	6.25 pCi/L	4
Oakland	5.00 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
Sacramento	4.33 pCi/L	3