Sullivan County, TN

ZIP 37620

In ZIP 37620, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Washington County Service Authority meets every EPA legal limit; 7 contaminants are above health goals, led by chloroform at 94× 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: Bristol Metals LP (54%), mostly chromium compounds.
• Fine particles (PM2.5) average 7.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 15,396 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 37620

• Superfund sites nearbyA
• Factories and industrial sitesC to F
• Oil and gas wellsA
• Parks and nature nearbyB to D
• Air qualityA to B
• Drinking water qualityB to C
• Pesticide useB to D
• Neighborhood health statusF
• Past wildfire impactsA
• Past flood impactsB
• Noise levelsA to D
• Radiation signalsC to F

Based on 14 census tracts · compiled October 25, 2026 · how each grade works and its sources

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