Madison County, NY

ZIP 13421

In ZIP 13421, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Ocwa meets every EPA legal limit; 13 contaminants are above health goals, led by arsenic at 275× California’s Public Health Goal.
• Closer to Superfund sites than 54% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Pratt & Whitney - Hmi Metal Powders (55%), mostly cobalt.
• Fine particles (PM2.5) average 5.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 97,322 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 13421

• Superfund sites nearbyA to C
• Factories and industrial sitesB to C
• Oil and gas wellsA to C
• Parks and nature nearbyC to D
• Air qualityA
• Drinking water qualityB to D
• Pesticide useD to F
• Neighborhood health statusC to D
• Past wildfire impactsA
• Past flood impactsB
• Noise levelsA to D
• Radiation signalsC to D

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

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