Mountain Pass, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Mountain Pass in?

Mountain Pass is in San Bernardino County, EPA Zone 2.

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

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

San Bernardino County

EPA Zone 2

Located in the Mojave Desert region of San Bernardino County, Mountain Pass sits in an area where granitic bedrock and fault systems can create localized radon accumulation zones. Testing data for zip code 92366 is currently unavailable, making individual home assessment important for the few residents in this sparsely populated area. Despite California's generally lower radon risk, the unique geological conditions near interstate corridors and mining areas warrant careful attention to indoor air quality.

Mountain Pass, CA Radon Mitigation

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

Mountain Pass, CA Radon Testing

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

Mountain Pass Radon Facts

Key details about the radon risk profile for Mountain Pass and the 92366 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

San Bernardino County, CA

Zip Code

92366

Predicted Screening Level

2–4 pCi/L (Zone 2)

Mountain Pass and the 92366 zip code are located in San Bernardino 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 Pass, CA

What EPA Radon Zone is Mountain Pass in?

Mountain Pass and the 92366 zip code are in San Bernardino 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 Pass?

Radon mitigation in Mountain Pass 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 Pass?

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