Oxnard, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Oxnard in?

Oxnard is in Ventura County, EPA Zone 1.

Q: How much does radon mitigation cost in Oxnard?

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

California's coastal Oxnard in Ventura County sits on marine terraces and alluvial deposits that typically produce lower radon levels. Testing data for the city's multiple zip codes (93030, 93033, 93035, 93036) remains limited, consistent with the EPA Zone 1 designation indicating lower radon risk. However, homeowners should still consider testing, especially in newer developments built over different geological formations or homes with unique construction features.

Oxnard, CA Radon Mitigation

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

Oxnard, CA Radon Testing

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

Oxnard Radon Facts

Key details about the radon risk profile for Oxnard and the 93030 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Ventura County, CA

Zip Code

93030

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Oxnard and the 93030 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 Oxnard, CA

What EPA Radon Zone is Oxnard in?

Oxnard and the 93030 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 Oxnard?

Radon mitigation in Oxnard 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 Oxnard?

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