Chino Hills, CA Radon Levels
Check local Chino Hills radon levels and find certified testing and mitigation professionals to keep your home safe
Chino Hills, CA Radon Facts
EPA Radon Zone
Zone 2 — Moderate Risk
2–4 pCi/L (Zone 2)
County
San Bernardino County, CA
Zip Code
91709
Straddling the Los Angeles and Riverside Metro areas in San Bernardino County, Chino Hills sits in EPA Zone 2 with moderate radon potential. The community's hillside location and diverse geological formations, including areas of granite and sedimentary rock, can produce variable radon levels from neighborhood to neighborhood. Since testing data is currently limited for zip code 91709, residents should consider professional radon testing, particularly in homes with basements or lower-level family rooms.
Chino Hills, 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 Chino Hills?
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Radon FAQ for Chino Hills, CA
What EPA Radon Zone is Chino Hills in?
Chino Hills and the 91709 zip code are in San Bernardino 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 Chino Hills?
Radon mitigation in Chino Hills 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 Chino Hills?
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 |