Napa, CA Radon Levels
Check local Napa radon levels and find certified testing and mitigation professionals to keep your home safe
Napa, CA Radon Facts
Situated in Napa County in California's famous wine region, Napa shows concerning radon levels that exceed EPA recommendations. Recent testing across zip codes 94558 and 94559 reveals an average reading of 8.0 pCi/L, which doubles the EPA's 4.0 pCi/L action threshold and likely reflects the area's complex geology of volcanic soils over fractured bedrock.
Based on 1 user-submitted radon test for homes in Napa, CA. The EPA recommends taking action at or above 4.0 pCi/L.
Napa, CA Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
Need Radon Mitigation or Testing in Napa?
- 100% Free, No-Obligation Quotes
- Matches You with State-Licensed Napa County Pros
Napa, CA Radon Levels
User-submitted radon test readings from homes in the Napa area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 8 pCi/L | Napa, CA | 0-20 Years | No Basement/All Slab |
Have a radon test result for Napa? Submit your reading to help other homeowners.
Radon FAQ for Napa, CA
What is the average radon level in Napa, CA?
What EPA Radon Zone is Napa in?
How much does radon mitigation cost in Napa?
Should I test for radon if I'm buying a home in Napa?
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 |