Weld County, CO

ZIP 80645

In ZIP 80645, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Keenesburg Town Of meets every EPA legal limit; 13 contaminants are above health goals, led by pfos at 1.7× 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: Terumo Bct Sterilization Services Inc (29%), mostly ethylene oxide.
• Fine particles (PM2.5) average 5.4 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 80645

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

Based on 5 census tracts · compiled September 10, 2026 · how each grade works and its sources

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