Bexar County, TX

ZIP 78101

In ZIP 78101, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Creekwood Estates meets every EPA legal limit; 6 contaminants are above health goals, led by dibromochloromethane at 88× California’s Public Health Goal.
• Closer to Superfund sites than 0% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Calaveras Power Station (74%), mostly chromium compounds.
• Fine particles (PM2.5) average 7.7 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 73,052 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 78101

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

Based on 6 census tracts · compiled October 25, 2026 · how each grade works and its sources

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