Weld County, CO

ZIP 80516

In ZIP 80516, 9 of the 12 things we check have at least one part graded D or F.

• Drinking water: Shannon Wsd meets every EPA legal limit; 9 contaminants are above health goals, led by bromodichloromethane at 188× California’s Public Health Goal.
• Nearest Superfund site: Marshall Landfill, 7.7 miles away.
• Largest share of modeled toxic air from industry: Terumo Bct Sterilization Services Inc (81%), mostly ethylene oxide.
• Fine particles (PM2.5) average 6.7 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 542,391 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 80516

• Superfund sites nearbyA to C
• Factories and industrial sitesB to D
• Oil and gas wellsD to F
• Parks and nature nearbyC to D
• Air qualityA to B
• Drinking water qualityC to D
• Pesticide useC to F
• Neighborhood health statusA to D
• Past wildfire impactsA
• Past flood impactsC to F
• Noise levelsA to D
• Radiation signalsF

Based on 14 census tracts · compiled September 10, 2026 · how each grade works and its sources

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