Windham County, CT

ZIP 06331

In ZIP 06331, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Ctwc - Plainfield System meets every EPA legal limit; 6 contaminants are above health goals, led by lead at 9.1× California’s Public Health Goal.
• Nearest Superfund site: Yaworski Waste Lagoon, 2.1 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Pcc Structurals (63%), mostly cobalt.
• Fine particles (PM2.5) average 5.4 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 06331

• Superfund sites nearbyC to F
• Factories and industrial sitesB
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityA
• Drinking water qualityC to D
• 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

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