Tarzana, CA Radon Mitigation and Testing

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

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

Q: What EPA Radon Zone is Tarzana in?

Tarzana is in Los Angeles County, EPA Zone 2.

Q: How much does radon mitigation cost in Tarzana?

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

Los Angeles County

EPA Zone 2

1 user test

Nestled in the San Fernando Valley within Los Angeles County, Tarzana shows an average radon level of 2.0 pCi/L based on available data from the 91356 zip code area. This reading falls within the EPA's recommended range, though testing remains important given California's varied geological conditions. The community's mix of mid-century ranch homes and newer construction sits on alluvial deposits that typically produce lower radon concentrations.

2.00

pCi/L average

Below EPA Action Level

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

4.0 EPA

10+

Tarzana, CA Radon Mitigation

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

Tarzana, CA Radon Testing

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

Tarzana, California Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
2 pCi/L	Tarzana, CA	51-99 Years	No Basement/All Slab	Dec 2019

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

Tarzana Radon Facts

Key details about the radon risk profile for Tarzana and the 91356 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Los Angeles County, CA

Zip Code

91356

Predicted Screening Level

2–4 pCi/L (Zone 2)

Avg. User Submitted Level

2.00 pCi/L

User Tests Submitted

Tarzana and the 91356 zip code are located in Los Angeles 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 Tarzana, CA

What is the average radon level in Tarzana, CA?

Based on 1 user-submitted test, the average radon level in Tarzana 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 Tarzana in?

Tarzana and the 91356 zip code are in Los Angeles 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 Tarzana?

Radon mitigation in Tarzana 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 Tarzana?

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