Newbury Park, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Newbury Park in?

Newbury Park is in Ventura County, EPA Zone 1.

Q: How much does radon mitigation cost in Newbury Park?

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

Ventura County

EPA Zone 1

Nestled in Ventura County's Conejo Valley within the Oxnard Metro area, Newbury Park sits on sedimentary formations that typically produce lower radon levels than other geological settings. The community's predominantly modern suburban homes built since the 1960s in zip code 91320 feature slab-on-grade construction common to Southern California. While testing data remains limited and the regional radon risk is generally lower, professional testing can help homeowners establish baseline readings for peace of mind.

Newbury Park, CA Radon Mitigation

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

Newbury Park, CA Radon Testing

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

Newbury Park Radon Facts

Key details about the radon risk profile for Newbury Park and the 91320 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Ventura County, CA

Zip Code

91320

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Newbury Park and the 91320 zip code are located in Ventura County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Newbury Park, CA

What EPA Radon Zone is Newbury Park in?

Newbury Park and the 91320 zip code are in Ventura County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.

How much does radon mitigation cost in Newbury Park?

Radon mitigation in Newbury Park 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 Newbury Park?

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