Bexar County, TX

ZIP 78237

In ZIP 78237, 7 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; 11 contaminants are above health goals, led by bromodichloromethane at 152× California’s Public Health Goal.
• Nearest Superfund site: Bandera Road Ground Water Plume, 5.1 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: The San Antonio Refinery LLC (50%), mostly benzene.
• Fine particles (PM2.5) average 9.2 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 78237

• Superfund sites nearbyD
• Factories and industrial sitesB to D
• Oil and gas wellsA to D
• Parks and nature nearbyB to D
• Air qualityD to F
• Drinking water qualityC
• Pesticide useB to C
• Neighborhood health statusD to F
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsB

Based on 14 census tracts · compiled October 25, 2026 · how each grade works and its sources

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