Knott County, KY

ZIP 41828

In ZIP 41828, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Mountain Water Dist has 2 contaminants at or over an EPA legal limit; 20 contaminants are above health goals, led by di(2-ethylhexyl) phthalate at 50× California’s Public Health Goal.
• Closer to Superfund sites than 0% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Langley Gas Plant (100%), mostly n-hexane (hexane).
• Fine particles (PM2.5) average 6.7 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 235 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 41828

• Superfund sites nearbyA
• Factories and industrial sitesA
• Oil and gas wellsF
• Parks and nature nearbyB
• Air qualityA
• Drinking water qualityD
• Pesticide useB
• Neighborhood health statusF
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA
• Radiation signalsD

Based on 1 census tract · compiled September 10, 2026 · how each grade works and its sources

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