Madera County, CA

ZIP 93626

In ZIP 93626, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Cal Am - Bass Lake has 1 contaminant at or over an EPA legal limit; 9 contaminants are above health goals, led by arsenic at 605× California’s Public Health Goal.
• Closer to Superfund sites than 57% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Ardagh Glass Inc (90%), mostly chromium compounds.
• Fine particles (PM2.5) average 9.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 4,047,585 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 93626

• Superfund sites nearbyA to C
• Factories and industrial sitesA to D
• Oil and gas wellsA
• Parks and nature nearbyA to C
• Air qualityF
• Drinking water qualityB to F
• Pesticide useF
• Neighborhood health statusB to F
• Past wildfire impactsA to F
• Past flood impactsC
• Noise levelsA
• Radiation signalsC to F

Based on 4 census tracts · compiled October 25, 2026 · how each grade works and its sources

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