Worcester County, MD

ZIP 21864

In ZIP 21864, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Town Of Snow Hill meets every EPA legal limit; 11 contaminants are above health goals, led by arsenic at 500× California’s Public Health Goal.
• Closer to Superfund sites than 57% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Trinity Sterile (86%), mostly ethylene oxide.
• Fine particles (PM2.5) average 7.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 122,817 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 21864

• Superfund sites nearbyA to C
• Factories and industrial sitesA to B
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityA to B
• Drinking water qualityD
• Pesticide useF
• Neighborhood health statusD to F
• Past wildfire impactsA
• Past flood impactsB
• Noise levelsA
• Radiation signalsB

Based on 2 census tracts · compiled September 10, 2026 · how each grade works and its sources

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