Windham County, CT

ZIP 06277

In ZIP 06277, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Dudley Water Department has 3 contaminants at or over an EPA legal limit; 11 contaminants are above health goals, led by thallium at 20× California’s Public Health Goal.
• Nearest Superfund site: Linemaster Switch Corp., 4.8 miles away.
• Largest share of modeled toxic air from industry: Boston Scientific (59%), mostly ethylene oxide.
• Fine particles (PM2.5) average 5.7 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 28,025 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 06277

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

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

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