Colfax, CA Radon Levels

Q: What EPA Radon Zone is Colfax in?

Colfax is in Placer County, EPA Zone 2.

Q: How much does radon mitigation cost in Colfax?

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

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

Colfax, CA Radon Facts

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

County Placer County, CA

Zip Code 95713

Positioned in Placer County within the Sacramento metro foothills, Colfax sits on Sierra Nevada granite formations where radon levels can vary significantly based on local geology and construction methods. While testing data for the 95713 area is currently limited, the granite bedrock and diverse housing stock suggest homeowners should conduct individual property testing. The community's mix of historic Gold Rush-era buildings and modern construction creates varied radon risk profiles across different neighborhoods.

Colfax, 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 Colfax, CA

What EPA Radon Zone is Colfax in?

Colfax and the 95713 zip code are in Placer 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 Colfax?

Radon mitigation in Colfax 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 Colfax?

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