Kent County, MD

ZIP 21620

In ZIP 21620, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Town Of Chestertown meets every EPA legal limit; 13 contaminants are above health goals, led by pfos at 2.2× California’s Public Health Goal.
• Closer to Superfund sites than 58% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Tnemec Co Inc (54%), mostly diisocyanates.
• Fine particles (PM2.5) average 7.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 193,271 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 21620

• Superfund sites nearbyA to C
• Factories and industrial sitesA to C
• Oil and gas wellsA
• Parks and nature nearbyD
• Air qualityB
• Drinking water qualityC to F
• Pesticide useF
• Neighborhood health statusD
• Past wildfire impactsA
• Past flood impactsB to C
• Noise levelsA to D
• Radiation signalsC

Based on 5 census tracts · compiled September 10, 2026 · how each grade works and its sources

Loading the full report, with every source…