New Haven County, CT

ZIP 06478

In ZIP 06478, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Aquarion-Valley has 2 contaminants at or over an EPA legal limit; 11 contaminants are above health goals, led by lead at 38× California’s Public Health Goal.
• Nearest Superfund site: Laurel Park, Inc., 4.9 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Mott Metallurgical Corp (41%), mostly chromium compounds.
• Fine particles (PM2.5) average 6.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 25,447 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 06478

• Superfund sites nearbyF
• Factories and industrial sitesB to C
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityA
• Drinking water qualityD to F
• Pesticide useC
• Neighborhood health statusC to D
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA
• Radiation signalsD

Based on 2 census tracts · compiled September 10, 2026 · how each grade works and its sources

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