Bexar County, TX

ZIP 78221

In ZIP 78221, 9 of the 12 things we check have at least one part graded D or F.

• Drinking water: San Antonio Water System meets every EPA legal limit; 19 contaminants are above health goals, led by lead at 14× California’s Public Health Goal.
• Nearest Superfund site: R & H Oil/tropicana Energy, 0.8 miles away.
• Largest share of modeled toxic air from industry: Arvin Sango (76%), mostly chromium.
• Fine particles (PM2.5) average 9.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 58,581 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 78221

• Superfund sites nearbyA to F
• Factories and industrial sitesC to D
• Oil and gas wellsD
• Parks and nature nearbyC to F
• Air qualityB to F
• Drinking water qualityD
• Pesticide useB to D
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsB to C

Based on 15 census tracts · compiled September 10, 2026 · how each grade works and its sources

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