Loma Mar, CA Radon Levels
Check local Loma Mar radon levels and find certified testing and mitigation professionals to keep your home safe
Loma Mar, CA Radon Facts
EPA Radon Zone
Zone 2 — Moderate Risk
2–4 pCi/L (Zone 2)
County
San Mateo County, CA
Zip Code
94021
Nestled in the Santa Cruz Mountains of San Mateo County, Loma Mar sits on complex geological formations where sedimentary rocks meet coastal terrain. Testing data for radon levels remains limited in this rural community (94021), making individual home testing especially important for residents. The mountainous terrain and varied soil conditions mean radon potential can differ significantly between properties in this scenic area.
Loma Mar, 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 Loma Mar?
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Radon FAQ for Loma Mar, CA
What EPA Radon Zone is Loma Mar in?
Loma Mar and the 94021 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 Loma Mar?
Radon mitigation in Loma Mar 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 Loma Mar?
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 |