Chittenden County, VT

ZIP 05403

In ZIP 05403, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Williston Water Dept meets every EPA legal limit; 5 contaminants are above health goals, led by chloroform at 82× California’s Public Health Goal.
• Nearest Superfund site: Commerce Street Plume, 2.0 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Pike Industries Inc. - Williston Vt (P800) (58%), mostly polycyclic aromatic compounds.
• Fine particles (PM2.5) average 7.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 13,551 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 05403

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

Based on 6 census tracts · compiled October 25, 2026 · how each grade works and its sources

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