Washington County, MD

ZIP 21734

In ZIP 21734, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: City Of Hagerstown has 1 contaminant at or over an EPA legal limit; 14 contaminants are above health goals, led by bromodichloromethane at 96× California’s Public Health Goal.
• Nearest Superfund site: Central Chemical (hagerstown), 3.9 miles away.
• Largest share of modeled toxic air from industry: Holcim(Us) Inc. (83%), mostly chromium.
• Fine particles (PM2.5) average 7.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 144,043 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 21734

• Superfund sites nearbyD
• Factories and industrial sitesC
• Oil and gas wellsA
• Parks and nature nearbyD
• Air qualityC
• Drinking water qualityD
• Pesticide useF
• Neighborhood health statusD
• Past wildfire impactsA
• Past flood impactsB
• Noise levelsC
• Radiation signalsF

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

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