Penn Valley, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Penn Valley in?

Penn Valley is in Nevada County, EPA Zone 2.

Q: How much does radon mitigation cost in Penn Valley?

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

Nevada County

EPA Zone 2

This Nevada County foothill community sits in California's Sierra Nevada region where granite bedrock can contribute to moderate radon levels in certain areas. The area's housing includes both older mountain homes and newer developments, many built on varied foundation types. With testing data limited for zip code 95946, residents should consider radon testing to establish baseline levels for their specific properties.

Penn Valley, CA Radon Mitigation

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

Penn Valley, CA Radon Testing

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

Penn Valley Radon Facts

Key details about the radon risk profile for Penn Valley and the 95946 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Nevada County, CA

Zip Code

95946

Predicted Screening Level

2–4 pCi/L (Zone 2)

Penn Valley and the 95946 zip code are located in Nevada 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 Penn Valley, CA

What EPA Radon Zone is Penn Valley in?

Penn Valley and the 95946 zip code are in Nevada 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 Penn Valley?

Radon mitigation in Penn Valley 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 Penn Valley?

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