Wishon, CA Radon Mitigation and Testing

Q: What EPA Radon Zone is Wishon in?

Wishon is in Madera County, EPA Zone 2.

Q: How much does radon mitigation cost in Wishon?

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

Madera County

EPA Zone 2

Perched in the Sierra Nevada foothills of Madera County within the greater Fresno Metro area, Wishon offers mountain living with granite bedrock formations typical of California's gold country. Testing data for radon in the 93669 zip code is currently limited, though the area's granite geology can occasionally produce moderate radon concentrations. Mountain residents should test their homes, particularly those with basement or crawl space foundations built into the region's rocky terrain.

Wishon, CA Radon Mitigation

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

Wishon, CA Radon Testing

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

Wishon Radon Facts

Key details about the radon risk profile for Wishon and the 93669 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Madera County, CA

Zip Code

93669

Predicted Screening Level

2–4 pCi/L (Zone 2)

Wishon and the 93669 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 Wishon, CA

What EPA Radon Zone is Wishon in?

Wishon and the 93669 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 Wishon?

Radon mitigation in Wishon 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 Wishon?

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