Half Moon Bay, CA Radon Levels
Check local Half Moon Bay radon levels and find certified testing and mitigation professionals to keep your home safe
Half Moon Bay, CA Radon Facts
EPA Radon Zone
Zone 2 — Moderate Risk
2–4 pCi/L (Zone 2)
County
San Mateo County, CA
Zip Code
94019
Located in San Mateo County along California's scenic Pacific coastline, Half Moon Bay sits on marine terraces and coastal sediments that generally produce low radon levels. While comprehensive radon testing data is currently limited for the 94019 area, homeowners should still consider testing given the variability in local geological conditions. Properties built on bluff areas or with basements may experience different radon conditions than typical coastal homes.
Half Moon Bay, 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 Half Moon Bay?
- 100% Free, No-Obligation Quotes
- Matches You with State-Licensed San Mateo County Pros
1-800-299-3578
Toll-free · Mon–Fri 8am–6pm ET
Radon FAQ for Half Moon Bay, CA
What EPA Radon Zone is Half Moon Bay in?
Half Moon Bay and the 94019 zip code are in San Mateo 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 Half Moon Bay?
Radon mitigation in Half Moon Bay 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 Half Moon Bay?
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 |