Cameron County, TX

ZIP 78559

In ZIP 78559, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Military Hwy Wsc Progreso meets every EPA legal limit; 11 contaminants are above health goals, led by arsenic at 1,260× 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: Ge Engine Services Mcallen LP (85%), mostly cobalt.
• Fine particles (PM2.5) average 9.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 257,100 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 78559

• Superfund sites nearbyA
• Factories and industrial sitesB to D
• Oil and gas wellsB to D
• Parks and nature nearbyC to F
• Air qualityC to F
• Drinking water qualityC
• Pesticide useD to F
• Neighborhood health statusB to F
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA
• Radiation signalsB

Based on 8 census tracts · compiled October 25, 2026 · how each grade works and its sources

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