Starr County, TX

ZIP 78585

In ZIP 78585, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: El Sauz Wsc meets every EPA legal limit; 9 contaminants are above health goals, led by lithium at 4.1× the USGS health-based screening level.
• Closer to Superfund sites than 0% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Fine particles (PM2.5) average 8.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 63,791 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 78585

• Superfund sites nearbyA
• Factories and industrial sitesA
• Oil and gas wellsD
• Parks and nature nearbyC
• Air qualityD
• Drinking water qualityC
• Pesticide useD
• Neighborhood health statusD
• Noise levelsA

Based on 1 census tract · compiled October 25, 2026 · how each grade works and its sources

Loading the full report, with every source…