Webb County, TX

ZIP 78040

In ZIP 78040, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: City Of Laredo meets every EPA legal limit; 15 contaminants are above health goals, led by lithium at 2.7× 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.
• Largest share of modeled toxic air from industry: Midwest Sterilization Corp (100%), mostly ethylene oxide.
• Fine particles (PM2.5) average 10.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 25,313 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 78040

• Superfund sites nearbyA
• Factories and industrial sitesD to F
• Oil and gas wellsD
• Parks and nature nearbyD to F
• Air qualityF
• Drinking water qualityD
• Pesticide useC
• Neighborhood health statusD to F
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsC

Based on 15 census tracts · compiled September 10, 2026 · how each grade works and its sources

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