Weld County, CO

ZIP 80620

In ZIP 80620, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Greeley City Of meets every EPA legal limit; 17 contaminants are above health goals, led by pfos at 1.8× 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: Mewbourn Gas Plant (52%), mostly benzene.
• Fine particles (PM2.5) average 6.9 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 80620

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

Based on 6 census tracts · compiled September 10, 2026 · how each grade works and its sources

Loading the full report, with every source…