Fresno, CA Radon Mitigation and Testing

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

Based on 2 user-submitted tests, the average radon level is 10.00 pCi/L.

Q: What EPA Radon Zone is Fresno in?

Fresno is in Fresno County, EPA Zone 2.

Q: How much does radon mitigation cost in Fresno?

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

Avg: 10.00 pCi/L

Fresno County

EPA Zone 2

2 user tests

Fresno is located in Fresno County, California. With 2 user-submitted readings averaging 10.00 pCi/L, the area exceeds the EPA's 4.0 pCi/L action threshold, and testing is strongly recommended for homeowners in the 93650 zip code.

10.00

pCi/L average

Above EPA Action Level

Based on 2 user-submitted radon tests for homes in Fresno, CA. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Fresno, CA Radon Mitigation

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

Fresno, CA Radon Testing

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

Fresno, California Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
12 pCi/L	Fresno, CA	0-20 Years	No Basement/All Slab	Jan 2023
8 pCi/L	Fresno, CA	21-50 Years	No Basement/All Slab	Feb 2022

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

Fresno Radon Facts

Key details about the radon risk profile for Fresno and the 93650 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Fresno County, CA

Zip Code

93650

Predicted Screening Level

2–4 pCi/L (Zone 2)

Avg. User Submitted Level

10.00 pCi/L

User Tests Submitted

Fresno and the 93650 zip code are located in Fresno 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 Fresno, CA

What is the average radon level in Fresno, CA?

Based on 2 user-submitted tests, the average radon level in Fresno is 10.00 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 Fresno in?

Fresno and the 93650 zip code are in Fresno 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 Fresno?

Radon mitigation in Fresno 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 Fresno?

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