Castroville, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Castroville in?

Castroville is in Monterey County, EPA Zone 2.

Q: How much does radon mitigation cost in Castroville?

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

Monterey County

EPA Zone 2

Set in Monterey County along California's Central Coast, Castroville sits in the Salinas Valley where marine sediments and alluvial soils typically produce lower radon levels. Testing data for the 95012 zip code area is currently limited, though the coastal geography generally indicates reduced radon risk. Residents should still test their homes, particularly those with basement or below-grade living spaces.

Castroville, CA Radon Mitigation

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

Castroville, CA Radon Testing

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

Castroville Radon Facts

Key details about the radon risk profile for Castroville and the 95012 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Monterey County, CA

Zip Code

95012

Predicted Screening Level

2–4 pCi/L (Zone 2)

Castroville and the 95012 zip code are located in Monterey 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 Castroville, CA

What EPA Radon Zone is Castroville in?

Castroville and the 95012 zip code are in Monterey 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 Castroville?

Radon mitigation in Castroville 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 Castroville?

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