Letcher County, KY

ZIP 41821

In ZIP 41821, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Perry County Water & Sewer meets every EPA legal limit; 3 contaminants are above health goals, led by lead at 20× 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: Joy Global Underground Mining LLC (100%), mostly chromium.
• Fine particles (PM2.5) average 6.6 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 314 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 41821

• Superfund sites nearbyA
• Factories and industrial sitesA
• Oil and gas wellsF
• Parks and nature nearbyB
• Air qualityA
• Drinking water qualityC to D
• Pesticide useC
• Neighborhood health statusF
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA
• Radiation signalsC

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

Loading the full report, with every source…