Lehigh County, PA

ZIP 18109

In ZIP 18109, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: Northampton Boro Muni Auth meets every EPA legal limit; 6 contaminants are above health goals, led by bromodichloromethane at 118× California’s Public Health Goal.
• Nearest Superfund site: Voortman Farm, 4.3 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: B. Braun Medical Inc Manufacturing Div (79%), mostly ethylene oxide.
• Fine particles (PM2.5) average 8.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 79,992 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 18109

• Superfund sites nearbyD to F
• Factories and industrial sitesF
• Oil and gas wellsA
• Parks and nature nearbyB to C
• Air qualityC to F
• Drinking water qualityC
• Pesticide useC to D
• Neighborhood health statusC to D
• Past wildfire impactsA
• Past flood impactsD
• Noise levelsA to F
• Radiation signalsF

Based on 7 census tracts · compiled October 25, 2026 · how each grade works and its sources

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