San Patricio County, TX

ZIP 78336

In ZIP 78336, 9 of the 12 things we check have at least one part graded D or F.

• Drinking water: Rincon Wsc meets every EPA legal limit; 9 contaminants are above health goals, led by lead at 19× California’s Public Health Goal.
• Nearest Superfund site: Falcon Refinery, 1.9 miles away.
• Largest share of modeled toxic air from industry: Gulf Coast Growth Ventures LLC (93%), mostly ethylene oxide.
• Fine particles (PM2.5) average 8.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 290,718 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 78336

• Superfund sites nearbyA to F
• Factories and industrial sitesB to D
• Oil and gas wellsD to F
• Parks and nature nearbyB to D
• Air qualityB to D
• Drinking water qualityC to D
• Pesticide useD to F
• Neighborhood health statusC to F
• Past wildfire impactsA
• Past flood impactsA to B
• Noise levelsA to D
• Radiation signalsB

Based on 9 census tracts · compiled September 10, 2026 · how each grade works and its sources

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