Fairfield County, CT

ZIP 06811

In ZIP 06811, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Danbury Water Department has 1 contaminant at or over an EPA legal limit; 9 contaminants are above health goals, led by pfoa at 614× California’s Public Health Goal.
• Nearest Superfund site: Brewster Well Field, 9.3 miles away.
• Largest share of modeled toxic air from industry: Schaeffler Aerospace USA Corp (63%), mostly 1-bromopropane.
• Fine particles (PM2.5) average 7.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 7,578 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 06811

• Superfund sites nearbyD
• Factories and industrial sitesC to D
• Oil and gas wellsA
• Parks and nature nearbyB to C
• Air qualityA to B
• Drinking water qualityA to D
• Pesticide useB
• Neighborhood health statusA to B
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA
• Radiation signalsD to F

Based on 8 census tracts · compiled October 25, 2026 · how each grade works and its sources

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