Harford County, MD

ZIP 21078

In ZIP 21078, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Harford County D.p.w. has 1 contaminant at or over an EPA legal limit; 18 contaminants are above health goals, led by pfoa at 3,029× California’s Public Health Goal.
• Nearest Superfund site: Woodlawn County Landfill, 6.1 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Tnemec Co Inc (56%), mostly diisocyanates.
• Fine particles (PM2.5) average 7.2 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 21078

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

Based on 8 census tracts · compiled September 10, 2026 · how each grade works and its sources

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