Bexar County, TX

ZIP 78239

In ZIP 78239, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: Bexar County Wcid 10 Windcrest meets every EPA legal limit; 8 contaminants are above health goals, led by arsenic at 121× California’s Public Health Goal.
• Nearest Superfund site: Eldorado Chemical Co., Inc., 4.4 miles away.
• Largest share of modeled toxic air from industry: Calaveras Power Station (30%), mostly chromium.
• Fine particles (PM2.5) average 8.7 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 78239

• Superfund sites nearbyD
• Factories and industrial sitesC to D
• Oil and gas wellsD
• Parks and nature nearbyD to F
• Air qualityF
• Drinking water qualityD
• Pesticide useB to C
• Neighborhood health statusC to D
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsC

Based on 6 census tracts · compiled September 10, 2026 · how each grade works and its sources

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