Lehigh County, PA

ZIP 18078

In ZIP 18078, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Walnutport Authority has 1 contaminant at or over an EPA legal limit; 11 contaminants are above health goals, led by pfos at 2.4× California’s Public Health Goal.
• Nearest Superfund site: Heleva Landfill, 2.7 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Carpenter Technology Corp (44%), mostly chromium compounds.
• Fine particles (PM2.5) average 7.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 91,749 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 18078

• Superfund sites nearbyD to F
• Factories and industrial sitesC to F
• Oil and gas wellsA
• Parks and nature nearbyB to C
• Air qualityB to C
• Drinking water qualityA to D
• Pesticide useD
• Neighborhood health statusC to D
• Past wildfire impactsA
• Past flood impactsC to D
• Noise levelsA to C
• Radiation signalsF

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

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