La Salle County, TX

ZIP 78021

In ZIP 78021, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Mcmullen County Tilden meets every EPA legal limit; 9 contaminants are above health goals, led by lead at 27× 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: Eog Resources Inc Titan Hub (66%), mostly formaldehyde.
• Fine particles (PM2.5) average 7.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 8,330 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 78021

• Superfund sites nearbyA
• Factories and industrial sitesA to B
• Oil and gas wellsD to F
• Parks and nature nearbyB
• Air qualityB to C
• Drinking water qualityD
• Pesticide useF
• Neighborhood health statusC to F
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA
• Radiation signalsC

Based on 2 census tracts · compiled September 10, 2026 · how each grade works and its sources

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