Washington County, TN

ZIP 37604

In ZIP 37604, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Jonesborough Water Dept meets every EPA legal limit; 3 contaminants are above health goals, led by tthm at 43× Peer-Reviewed Research.
• 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: Snap-On Tools Co (55%), mostly chromium.
• Fine particles (PM2.5) average 7.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 66,271 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 37604

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

Based on 18 census tracts · compiled October 25, 2026 · how each grade works and its sources

Loading the full report, with every source…