Lewiston, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Lewiston in?

Lewiston is in Trinity County, EPA Zone 3.

Q: How much does radon mitigation cost in Lewiston?

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

Trinity County

EPA Zone 3

Situated in Trinity County in Northern California's mountainous region, Lewiston sits where Sierra Nevada geology creates varying radon potential across the landscape. Testing data remains limited for zip code 96052, making individual home radon testing important despite California's generally lower radon levels. The area's granite bedrock and mountain geography can create localized conditions where radon accumulation occurs in homes with basements or crawl spaces.

Lewiston, CA Radon Mitigation

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

Lewiston, CA Radon Testing

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

Lewiston Radon Facts

Key details about the radon risk profile for Lewiston and the 96052 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Trinity County, CA

Zip Code

96052

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Lewiston and the 96052 zip code are located in Trinity 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 Lewiston, CA

What EPA Radon Zone is Lewiston in?

Lewiston and the 96052 zip code are in Trinity 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 Lewiston?

Radon mitigation in Lewiston 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 Lewiston?

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