Howard County, MD

ZIP 20723

In ZIP 20723, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Washington Suburban Sanitary Commission meets every EPA legal limit; 4 contaminants are above health goals, led by bromodichloromethane at 96× California’s Public Health Goal.
• Nearest Superfund site: Fort George G. Meade, 5.1 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Elite Spice Inc. (52%), 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 20723

• Superfund sites nearbyC to D
• Factories and industrial sitesC to F
• Oil and gas wellsA
• Parks and nature nearbyB to D
• Air qualityB to F
• Drinking water qualityA to C
• Pesticide useB to C
• Neighborhood health statusA to B
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to B
• Radiation signalsB to D

Based on 8 census tracts · compiled October 25, 2026 · how each grade works and its sources

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