Howard County, MD

ZIP 21046

In ZIP 21046, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Howard County D.p.w. Distribution meets every EPA legal limit; 0 contaminants are above health goals, led by trichloroacetic acid at 177× California’s Public Health Goal.
• Nearest Superfund site: Fort George G. Meade, 7.2 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Elite Spice Inc. (49%), mostly ethylene oxide.
• Fine particles (PM2.5) average 8.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 35,799 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 21046

• Superfund sites nearbyC to D
• Factories and industrial sitesC to D
• Oil and gas wellsA
• Parks and nature nearbyB
• Air qualityC to F
• Drinking water qualityA
• Pesticide useD
• Neighborhood health statusA to C
• Past wildfire impactsA
• Past flood impactsB to C
• Noise levelsA to D
• Radiation signalsC

Based on 4 census tracts · compiled October 25, 2026 · how each grade works and its sources

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