Alleghany, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Alleghany in?

Alleghany is in Sierra County, EPA Zone 2.

Q: How much does radon mitigation cost in Alleghany?

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

Sierra County

EPA Zone 2

Perched in Sierra County in California's northern Sierra Nevada foothills, Alleghany represents a historic gold mining community where granite and metamorphic bedrock generally produce lower radon levels. This mountain community in zip code 95910 features primarily older homes and cabins, many built on pier or partial basement foundations suited to the steep terrain. While radon testing data for Alleghany remains limited, the area's geological context suggests moderate radon potential, warranting periodic testing by homeowners.

Alleghany, CA Radon Mitigation

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

Alleghany, CA Radon Testing

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

Alleghany Radon Facts

Key details about the radon risk profile for Alleghany and the 95910 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Sierra County, CA

Zip Code

95910

Predicted Screening Level

2–4 pCi/L (Zone 2)

Alleghany and the 95910 zip code are located in Sierra 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 Alleghany, CA

What EPA Radon Zone is Alleghany in?

Alleghany and the 95910 zip code are in Sierra 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 Alleghany?

Radon mitigation in Alleghany 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 Alleghany?

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