Baltimore County, MD

ZIP 21156

In ZIP 21156, 4 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: Aberdeen Proving Ground (edgewood Area), 7.1 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Elite Spice Inc. (60%), mostly ethylene oxide.
• Fine particles (PM2.5) average 7.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 87,878 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 21156

• Superfund sites nearbyD
• Factories and industrial sitesB
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityC
• Drinking water qualityD to F
• Pesticide useD
• Neighborhood health statusD
• Past wildfire impactsA
• Past flood impactsB
• Noise levelsA

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

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