Hidalgo County, TX

ZIP 78537

In ZIP 78537, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: Military Hwy Wsc Weslaco meets every EPA legal limit; 8 contaminants are above health goals, led by lead at 122× California’s Public Health Goal.
• Nearest Superfund site: Donna Reservoir and Canal System, 1.1 miles away.
• Largest share of modeled toxic air from industry: Ge Engine Services Mcallen LP (96%), mostly cobalt.
• Fine particles (PM2.5) average 8.9 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 78537

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

Based on 21 census tracts · compiled September 10, 2026 · how each grade works and its sources

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