Larimer County, CO

ZIP 80528

In ZIP 80528, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Johnstown Town Of meets every EPA legal limit; 6 contaminants are above health goals, led by di(2-ethylhexyl) phthalate at 27× 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 (30%), mostly benzene.
• Fine particles (PM2.5) average 7.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 63,666 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 80528

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

Based on 8 census tracts · compiled September 10, 2026 · how each grade works and its sources

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