Merced County, CA

ZIP 95301

In ZIP 95301, 9 of the 12 things we check have at least one part graded D or F.

• Drinking water: Castle Airport has 2 contaminants at or over an EPA legal limit; 11 contaminants are above health goals, led by lead at 154× California’s Public Health Goal.
• Nearest Superfund site: Castle Air Force Base (6 Areas), 2.7 miles away.
• Largest share of modeled toxic air from industry: Foster Farms Livingston Complex (91%), mostly peracetic acid.
• Fine particles (PM2.5) average 11.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 3,159,442 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 95301

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

Based on 14 census tracts · compiled September 10, 2026 · how each grade works and its sources

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