Stevenson Ranch, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Stevenson Ranch in?

Stevenson Ranch is in Los Angeles County, EPA Zone 2.

Q: How much does radon mitigation cost in Stevenson Ranch?

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

Los Angeles County

EPA Zone 2

This master-planned community in Los Angeles County features newer construction built over sedimentary formations typical of the Santa Clarita Valley. While testing data for zip code 91381 is currently limited, the area's geological setting generally produces lower radon levels. However, individual homes can vary significantly, making professional radon testing a wise precaution for Los Angeles Metro residents.

Stevenson Ranch, CA Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

Stevenson Ranch, CA Radon Testing

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

Stevenson Ranch Radon Facts

Key details about the radon risk profile for Stevenson Ranch and the 91381 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Los Angeles County, CA

Zip Code

91381

Predicted Screening Level

2–4 pCi/L (Zone 2)

Stevenson Ranch and the 91381 zip code are located in Los Angeles 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 Stevenson Ranch, CA

What EPA Radon Zone is Stevenson Ranch in?

Stevenson Ranch and the 91381 zip code are in Los Angeles 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 Stevenson Ranch?

Radon mitigation in Stevenson Ranch 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 Stevenson Ranch?

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