Merced County, CA

ZIP 95303

In ZIP 95303, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: City Of Merced has 1 contaminant at or over an EPA legal limit; 19 contaminants are above health goals, led by vanadium at 1.5× California’s Public Health Goal.
• Nearest Superfund site: Castle Air Force Base (6 Areas), 6.2 miles away.
• Largest share of modeled toxic air from industry: Gallo Glass Co (49%), mostly chromium compounds.
• Fine particles (PM2.5) average 10.2 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 95303

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

Based on 2 census tracts · compiled September 10, 2026 · how each grade works and its sources

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