Moss Beach, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Moss Beach in?

Moss Beach is in San Mateo County, EPA Zone 2.

Q: How much does radon mitigation cost in Moss Beach?

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

San Mateo County

EPA Zone 2

Coastal San Mateo County community Moss Beach sits on marine sediments and bedrock that typically produce lower radon levels near the Pacific Ocean. Testing data for zip code 94038 within the San Francisco Metro remains limited, though California's coastal areas generally show reduced radon potential. Ocean proximity and consistent winds help ventilate soil gases, though homeowners should still consider testing for peace of mind.

Moss Beach, CA Radon Mitigation

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

Moss Beach, CA Radon Testing

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

Moss Beach Radon Facts

Key details about the radon risk profile for Moss Beach and the 94038 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

San Mateo County, CA

Zip Code

94038

Predicted Screening Level

2–4 pCi/L (Zone 2)

Moss Beach and the 94038 zip code are located in San Mateo 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 Moss Beach, CA

What EPA Radon Zone is Moss Beach in?

Moss Beach and the 94038 zip code are in San Mateo 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 Moss Beach?

Radon mitigation in Moss Beach 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 Moss Beach?

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