Carroll County, MD

ZIP 21074

In ZIP 21074, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Town Of Manchester meets every EPA legal limit; 9 contaminants are above health goals, led by pfos at 2.5× California’s Public Health Goal.
• Nearest Superfund site: Keystone Sanitation Landfill, 9.6 miles away.
• Largest share of modeled toxic air from industry: Tate Access Floors Inc. (43%), mostly chromium.
• Fine particles (PM2.5) average 7.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 164,787 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 21074

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

Based on 7 census tracts · compiled September 10, 2026 · how each grade works and its sources

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