New London County, CT

ZIP 06320

In ZIP 06320, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Waterford Wpca meets every EPA legal limit; 6 contaminants are above health goals, led by lead at 120× California’s Public Health Goal.
• Nearest Superfund site: New London Submarine Base, 2.3 miles away.
• Largest share of modeled toxic air from industry: Pcc Structurals (65%), mostly cobalt.
• Fine particles (PM2.5) average 6.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 21,460 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 06320

• Superfund sites nearbyD to F
• Factories and industrial sitesC
• Oil and gas wellsA
• Parks and nature nearbyC to F
• Air qualityA
• Drinking water qualityD to F
• Pesticide useD
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsC to D
• Noise levelsA to D

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

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