Charles County, MD

ZIP 20637

In ZIP 20637, 2 of the 12 things we check have at least one part graded D or F.

• Drinking water: Benedict meets every EPA legal limit; 4 contaminants are above health goals, led by arsenic at 1,731× California’s Public Health Goal.
• Nearest Superfund site: Brandywine Drmo, 7.5 miles away.
• Largest share of modeled toxic air from industry: Waldorf Plant (52%), mostly lead.
• Fine particles (PM2.5) average 6.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 43,120 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 20637

• Superfund sites nearbyA to C
• Factories and industrial sitesA
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityA
• Drinking water qualityD
• Pesticide useD
• Neighborhood health statusC
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA
• Radiation signalsC

Based on 3 census tracts · compiled September 10, 2026 · how each grade works and its sources

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