Bexar County, TX

ZIP 78220

In ZIP 78220, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Green Valley Sud meets every EPA legal limit; 8 contaminants are above health goals, led by chloroform at 5.9× California’s Public Health Goal.
• Nearest Superfund site: R & H Oil/tropicana Energy, 6.3 miles away.
• Largest share of modeled toxic air from industry: Calaveras Power Station (44%), mostly chromium compounds.
• Fine particles (PM2.5) average 9.3 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 78220

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

Based on 10 census tracts · compiled October 25, 2026 · how each grade works and its sources

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