Bexar County, TX

ZIP 78243

In ZIP 78243, 3 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: R & H Oil/tropicana Energy, 2.8 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Arvin Sango (45%), mostly chromium.
• 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 78243

• Superfund sites nearbyF
• Factories and industrial sitesC
• Oil and gas wellsD
• Parks and nature nearbyC
• Air qualityF
• Drinking water qualityB to C
• Pesticide useB
• Neighborhood health statusA
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsC
• Radiation signalsB

Based on 1 census tract · compiled October 25, 2026 · how each grade works and its sources

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