Somerset County, PA

ZIP 15531

In ZIP 15531, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Highridge Water Auth has 3 contaminants at or over an EPA legal limit; 14 contaminants are above health goals, led by pfos at 4.5× 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 (21%), mostly nickel compounds.
• Fine particles (PM2.5) average 7.2 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 15531

• Superfund sites nearbyA
• Factories and industrial sitesB to C
• Oil and gas wellsC to F
• Parks and nature nearbyC
• Air qualityB
• Drinking water qualityC to F
• Pesticide useD to F
• Neighborhood health statusD to F
• Past wildfire impactsA
• Past flood impactsC to F
• Noise levelsA
• Radiation signalsC to D

Based on 7 census tracts · compiled September 10, 2026 · how each grade works and its sources

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