Newcastle, CA Radon Levels

Q: What EPA Radon Zone is Newcastle in?

Newcastle is in Placer County, EPA Zone 2.

Q: How much does radon mitigation cost in Newcastle?

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

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

Newcastle, CA Radon Facts

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

County Placer County, CA

Zip Code 95658

Situated in Placer County within the Sacramento Metro foothills, Newcastle's position on Sierra Nevada granite and metamorphic rock formations can contribute to varying radon levels across the area. The community's mix of rural properties and newer subdivision development in zip code 95658 reflects the region's transition from agricultural to residential use. With current testing data limited, homeowners should consider professional radon assessment to understand their specific risk given the underlying geological complexity.

Newcastle, 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 Newcastle, CA

What EPA Radon Zone is Newcastle in?

Newcastle and the 95658 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 Newcastle?

Radon mitigation in Newcastle 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 Newcastle?

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