Seaside, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Seaside in?

Seaside is in Monterey County, EPA Zone 2.

Q: How much does radon mitigation cost in Seaside?

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

Located in Monterey County within the Salinas Metro area, Seaside sits on coastal terraces where marine sediments typically produce low radon conditions. Testing data for zip code 93955 is currently limited, though California's coastal geology generally results in minimal radon accumulation. Residents should still consider baseline testing, particularly in homes with enclosed spaces below grade or energy-efficient construction that might trap radon.

Seaside, CA Radon Mitigation

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

Seaside, CA Radon Testing

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

Seaside Radon Facts

Key details about the radon risk profile for Seaside and the 93955 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Monterey County, CA

Zip Code

93955

Predicted Screening Level

2–4 pCi/L (Zone 2)

Seaside and the 93955 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 Seaside, CA

What EPA Radon Zone is Seaside in?

Seaside and the 93955 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 Seaside?

Radon mitigation in Seaside 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 Seaside?

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