Visalia, CA Radon Mitigation and Testing

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

Based on 1 user-submitted tests, the average radon level is 7.00 pCi/L.

Q: What EPA Radon Zone is Visalia in?

Visalia is in Tulare County, EPA Zone 2.

Q: How much does radon mitigation cost in Visalia?

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

Avg: 7.00 pCi/L

Tulare County

EPA Zone 2

1 user test

Located in Tulare County within the Visalia Metro area, this community has recorded an average radon level of 7.0 pCi/L that significantly exceeds EPA action guidelines. The Central Valley's alluvial soils and agricultural setting can sometimes trap radon gas more readily than expected in California's typically low-radon environment. Residents across zip codes 93277, 93291, and 93292 should prioritize radon testing and mitigation when elevated levels are confirmed.

7.00

pCi/L average

Above EPA Action Level

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

4.0 EPA

10+

Visalia, CA Radon Mitigation

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

Visalia, CA Radon Testing

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

Visalia, California Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
7 pCi/L	Visalia, CA	0-20 Years	No Basement/All Slab	Feb 2024

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

Visalia Radon Facts

Key details about the radon risk profile for Visalia and the 93277 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Tulare County, CA

Zip Code

93277

Predicted Screening Level

2–4 pCi/L (Zone 2)

Avg. User Submitted Level

7.00 pCi/L

User Tests Submitted

Visalia and the 93277 zip code are located in Tulare 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 Visalia, CA

What is the average radon level in Visalia, CA?

Based on 1 user-submitted test, the average radon level in Visalia is 7.00 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 Visalia in?

Visalia and the 93277 zip code are in Tulare 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 Visalia?

Radon mitigation in Visalia 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 Visalia?

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