Bexar County, TX

ZIP 78216

In ZIP 78216, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Saws Castle Hills meets every EPA legal limit; 8 contaminants are above health goals, led by pfos at 2.3× California’s Public Health Goal.
• Nearest Superfund site: Eldorado Chemical Co., Inc., 7.5 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Calaveras Power Station (41%), mostly chromium compounds.
• Fine particles (PM2.5) average 9.5 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 78216

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

Based on 19 census tracts · compiled October 25, 2026 · how each grade works and its sources

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