Windham County, CT

ZIP 06255

In ZIP 06255, 4 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., 4.3 miles away.
• Largest share of modeled toxic air from industry: Mace Adhesives & Coatings Co I Nc (67%), mostly chromium compounds.
• Fine particles (PM2.5) average 5.6 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 06255

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

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

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