Charles County, MD

ZIP 20662

In ZIP 20662, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Garden Estates Central Water meets every EPA legal limit; 3 contaminants are above health goals, led by chloroform at 8.1× California’s Public Health Goal.
• Nearest Superfund site: Indian Head Naval Surface Warfare Center, 7.7 miles away.
• Largest share of modeled toxic air from industry: Waldorf Plant (35%), mostly lead.
• Fine particles (PM2.5) average 7.0 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 20662

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

Based on 2 census tracts · compiled October 25, 2026 · how each grade works and its sources

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