Larimer County, CO

ZIP 80513

In ZIP 80513, 7 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 bromodichloromethane at 85× 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: Arc Colorado Inc. (27%), mostly trichloroethylene.
• 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 80513

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

Based on 7 census tracts · compiled October 25, 2026 · how each grade works and its sources

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