Charles County, MD

ZIP 20675

In ZIP 20675, none of the 12 things we check has a 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: Indian Head Naval Surface Warfare Center, 8.8 miles away.
• Largest share of modeled toxic air from industry: Waldorf Plant (75%), mostly lead.
• Fine particles (PM2.5) average 6.9 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 20675

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

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

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