Tracy, CA Radon Mitigation and Testing

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

Based on 1 user-submitted tests, the average radon level is 4.00 pCi/L.

Q: What EPA Radon Zone is Tracy in?

Tracy is in San Joaquin County, EPA Zone 3.

Q: How much does radon mitigation cost in Tracy?

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

Avg: 4.00 pCi/L

San Joaquin County

EPA Zone 3

1 user test

Tracy in San Joaquin County shows an average radon level of 4.0 pCi/L, which sits right at the EPA action threshold, indicating that some homes may exceed safe levels while others remain below. This Central Valley community's location over sedimentary soils and proximity to the Bay Area creates moderate radon potential across zip codes 95304, 95376, 95377, and 95391. Regular testing remains recommended for homeowners, especially those with basements or crawl spaces.

4.00

pCi/L average

Above EPA Action Level

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

4.0 EPA

10+

Tracy, CA Radon Mitigation

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

Tracy, CA Radon Testing

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

Tracy, California Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
4 pCi/L	Tracy, CA	51-99 Years	No Basement/All Slab	Feb 2025

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

Tracy Radon Facts

Key details about the radon risk profile for Tracy and the 95304 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

San Joaquin County, CA

Zip Code

95304

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Avg. User Submitted Level

4.00 pCi/L

User Tests Submitted

Tracy and the 95304 zip code are located in San Joaquin 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 Tracy, CA

What is the average radon level in Tracy, CA?

Based on 1 user-submitted test, the average radon level in Tracy is 4.00 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is Tracy in?

Tracy and the 95304 zip code are in San Joaquin 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 Tracy?

Radon mitigation in Tracy 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 Tracy?

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