New London County, CT

ZIP 06339

In ZIP 06339, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Norwich Public Utilities has 3 contaminants at or over an EPA legal limit; 14 contaminants are above health goals, led by pfos at 12× California’s Public Health Goal.
• Nearest Superfund site: New London Submarine Base, 3.0 miles away.
• Largest share of modeled toxic air from industry: Pcc Structurals (72%), mostly cobalt.
• Fine particles (PM2.5) average 5.6 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 06339

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

Based on 3 census tracts · compiled September 10, 2026 · how each grade works and its sources

Loading the full report, with every source…