Carroll County, MD

ZIP 21157

In ZIP 21157, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Taylorsville Mhc, Llc has 2 contaminants at or over an EPA legal limit; 7 contaminants are above health goals, led by 1,2,3-trichloropropane at 1,386× California’s Public Health Goal.
• Nearest Superfund site: Keystone Sanitation Landfill, 8.4 miles away.
• Largest share of modeled toxic air from industry: Elite Spice Inc. (60%), mostly ethylene oxide.
• Fine particles (PM2.5) average 7.7 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 21157

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

Based on 16 census tracts · compiled September 10, 2026 · how each grade works and its sources

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