Chino Hills, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Chino Hills in?

Chino Hills is in San Bernardino County, EPA Zone 2.

Q: How much does radon mitigation cost in Chino Hills?

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

San Bernardino County

EPA Zone 2

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.

Chino Hills, CA Radon Testing

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

Chino Hills Radon Facts

Key details about the radon risk profile for Chino Hills and the 91709 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

San Bernardino County, CA

Zip Code

91709

Predicted Screening Level

2–4 pCi/L (Zone 2)

Chino Hills and the 91709 zip code are located in San Bernardino 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 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 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