Hidalgo County, TX

ZIP 78570

In ZIP 78570, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Llano Grande Lake Park West meets every EPA legal limit; 8 contaminants are above health goals, led by lead at 77× California’s Public Health Goal.
• Nearest Superfund site: Donna Reservoir and Canal System, 8.5 miles away.
• Largest share of modeled toxic air from industry: Ge Engine Services Mcallen LP (98%), mostly cobalt.
• Fine particles (PM2.5) average 9.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 764,635 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 78570

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

Based on 11 census tracts · compiled September 10, 2026 · how each grade works and its sources

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