Mercer County, NJ

ZIP 08525

In ZIP 08525, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Pennington W Dept has 2 contaminants at or over an EPA legal limit; 12 contaminants are above health goals, led by arsenic at 1,098× California’s Public Health Goal.
• Nearest Superfund site: Montgomery Township Housing Development, 2.6 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Custom Alloy Corp (49%), mostly chromium.
• Fine particles (PM2.5) average 6.7 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 64,060 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 08525

• Superfund sites nearbyA to F
• Factories and industrial sitesB
• Oil and gas wellsA
• Parks and nature nearbyB
• Air qualityA to B
• Drinking water qualityC to F
• Pesticide useC to D
• Neighborhood health statusA to C
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to D
• Radiation signalsD to F

Based on 6 census tracts · compiled October 25, 2026 · how each grade works and its sources

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