Jefferson County, PA

ZIP 15840

In ZIP 15840, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Sykesville Borough meets every EPA legal limit; 8 contaminants are above health goals, led by chloroform at 94× California’s Public Health Goal.
• Closer to Superfund sites than 91% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Owens-Brockway Glass Container Inc Plant 18 (90%), mostly chromium compounds.
• Fine particles (PM2.5) average 6.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 23,193 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 15840

• Superfund sites nearbyD to F
• Factories and industrial sitesA to B
• Oil and gas wellsF
• Parks and nature nearbyB to C
• Air qualityB
• Drinking water qualityA to C
• Pesticide useD
• Neighborhood health statusD to F
• Past wildfire impactsA
• Past flood impactsC to F
• Noise levelsA to C
• Radiation signalsD to F

Based on 3 census tracts · compiled October 25, 2026 · how each grade works and its sources

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