Cecil County, MD

ZIP 21918

In ZIP 21918, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Conowingo Mobile Home Park has 2 contaminants at or over an EPA legal limit; 5 contaminants are above health goals, led by pfos at 10× California’s Public Health Goal.
• Nearest Superfund site: Woodlawn County Landfill, 1.0 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Goodhart Sons Inc. (51%), mostly chromium.
• Fine particles (PM2.5) average 7.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 89,478 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 21918

• Superfund sites nearbyD to F
• Factories and industrial sitesB
• Oil and gas wellsA
• Parks and nature nearbyC to D
• Air qualityB
• Drinking water qualityA to F
• Pesticide useD to F
• Neighborhood health statusD
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA
• Radiation signalsC to D

Based on 4 census tracts · compiled October 25, 2026 · how each grade works and its sources

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