Montgomery County, MD

ZIP 20894

In ZIP 20894, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Washington Suburban Sanitary Commission has 2 contaminants at or over an EPA legal limit; 20 contaminants are above health goals, led by arsenic at 274× California’s Public Health Goal.
• Nearest Superfund site: Washington Navy Yard, 10.0 miles away.
• Largest share of modeled toxic air from industry: Elite Spice Inc. (59%), mostly ethylene oxide.
• Fine particles (PM2.5) average 8.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 70,837 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 20894

• Superfund sites nearbyA
• Factories and industrial sitesB
• Oil and gas wellsA
• Parks and nature nearbyD
• Air qualityD
• Drinking water qualityD
• Pesticide useD
• Neighborhood health statusA
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsD

Based on 1 census tract · compiled September 10, 2026 · how each grade works and its sources

Loading the full report, with every source…