Washington County, MD

ZIP 21722

In ZIP 21722, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Cedar Ridge Children's Home & School meets every EPA legal limit; 6 contaminants are above health goals, led by bromodichloromethane at 99× California’s Public Health Goal.
• Nearest Superfund site: Central Chemical (hagerstown), 6.6 miles away.
• Largest share of modeled toxic air from industry: Holcim(Us) Inc. (47%), 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 21722

• Superfund sites nearbyA to D
• Factories and industrial sitesA to C
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityB to C
• Drinking water qualityB to C
• Pesticide useD to F
• Neighborhood health statusF
• Past wildfire impactsA
• Past flood impactsB
• Noise levelsA to C
• Radiation signalsF

Based on 2 census tracts · compiled October 25, 2026 · how each grade works and its sources

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