Somerset County, PA

ZIP 15557

In ZIP 15557, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Confluence Boro Muni Auth meets every EPA legal limit; 7 contaminants are above health goals, led by dibromochloromethane at 66× California’s Public Health Goal.
• Closer to Superfund sites than 0% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Aaadcg Inc. Rockwood Div (98%), mostly chromium.
• Fine particles (PM2.5) average 7.4 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 64,971 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 15557

• Superfund sites nearbyA
• Factories and industrial sitesB to F
• Oil and gas wellsD
• Parks and nature nearbyB to C
• Air qualityB to C
• Drinking water qualityB to C
• Pesticide useD to F
• Neighborhood health statusF
• Past wildfire impactsA
• Past flood impactsC to D
• Noise levelsA to D
• Radiation signalsB to C

Based on 4 census tracts · compiled October 25, 2026 · how each grade works and its sources

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