Harford County, MD

ZIP 21161

In ZIP 21161, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: York Water Co meets every EPA legal limit; 11 contaminants are above health goals, led by pfos at 1.6× California’s Public Health Goal.
• Closer to Superfund sites than 0% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Goodhart Sons Inc. (36%), mostly chromium.
• Fine particles (PM2.5) average 7.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 93,693 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 21161

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

Based on 6 census tracts · compiled October 25, 2026 · how each grade works and its sources

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