Merced, CA Radon Mitigation and Testing

Q: What is the average radon level in Merced, CA?

Based on 1 user-submitted tests, the average radon level is 2.00 pCi/L.

Q: What EPA Radon Zone is Merced in?

Merced is in Merced County, EPA Zone 3.

Q: How much does radon mitigation cost in Merced?

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

Avg: 2.00 pCi/L

Merced County

EPA Zone 3

1 user test

Located in California's Central Valley within Merced County, this agricultural hub sits atop alluvial soils and sedimentary deposits that typically produce lower radon levels. While testing data for the 95340, 95341, 95343, and 95348 zip codes remains limited, the area's EPA Zone 3 classification indicates relatively low radon potential. Central Valley homes should still consider periodic testing, particularly those with basements or built on elevated lots.

2.00

pCi/L average

Below EPA Action Level

Based on 1 user-submitted radon test for homes in Merced, CA. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Merced, CA Radon Mitigation

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

Merced, CA Radon Testing

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

Merced, California Radon Levels

User-submitted radon test readings from homes in the Merced area.

Radon Level	City	Home Age	Foundation	Submitted
2 pCi/L	Merced, CA	0-20 Years	No Basement/All Slab	May 2026

Have a radon test result for Merced? Submit your reading to help other homeowners.

Merced Radon Facts

Key details about the radon risk profile for Merced and the 95340 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Merced County, CA

Zip Code

95340

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Avg. User Submitted Level

2.00 pCi/L

User Tests Submitted

Merced and the 95340 zip code are located in Merced County, which has an EPA assigned Radon Zone of 3. A radon zone of 3 predicts an average indoor radon screening level less than 2 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Merced, CA

What is the average radon level in Merced, CA?

Based on 1 user-submitted test, the average radon level in Merced is 2.00 pCi/L. This is below the EPA's recommended action level of 4.0 pCi/L. However, we recommend all homes be tested regardless of your neighbor's results.

What EPA Radon Zone is Merced in?

Merced and the 95340 zip code are in Merced County, which has an EPA assigned Radon Zone of 3. A zone of 3 predicts an average indoor radon screening level less than 2 pCi/L.

How much does radon mitigation cost in Merced?

Radon mitigation in Merced 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 Merced?

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