Madera, CA Radon Mitigation and Testing

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

Based on 2 user-submitted tests, the average radon level is 4.00 pCi/L.

Q: What EPA Radon Zone is Madera in?

Madera is in Madera County, EPA Zone 2.

Q: How much does radon mitigation cost in Madera?

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

Madera County

EPA Zone 2

2 user tests

Located in Madera County within the Fresno Metro area, this 93636 community sits in California's Central Valley where alluvial deposits typically produce moderate radon levels. Testing data is currently limited for this area, making individual home assessment important for accurate risk evaluation. Residents should consider professional radon testing to ensure their homes maintain safe indoor air quality standards.

4.00

pCi/L average

Above EPA Action Level

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

4.0 EPA

10+

Madera, CA Radon Mitigation

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

Madera, CA Radon Testing

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

Madera, California Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
4 pCi/L	Madera, CA	0-20 Years	No Basement/All Slab	Mar 2026

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

Madera Radon Facts

Key details about the radon risk profile for Madera and the 93636 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Madera County, CA

Zip Code

93636

Predicted Screening Level

2–4 pCi/L (Zone 2)

Avg. User Submitted Level

4.00 pCi/L

User Tests Submitted

Madera and the 93636 zip code are located in Madera 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 Madera, CA

What is the average radon level in Madera, CA?

Based on 2 user-submitted tests, the average radon level in Madera 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 Madera in?

Madera and the 93636 zip code are in Madera 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 Madera?

Radon mitigation in Madera 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 Madera?

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