Somerset County, PA

ZIP 15905

In ZIP 15905, 10 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: Conemaugh Generating Station (20%), mostly arsenic compounds.
• Fine particles (PM2.5) average 7.9 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 15905

• Superfund sites nearbyA
• Factories and industrial sitesC to D
• Oil and gas wellsC to D
• Parks and nature nearbyB to F
• Air qualityB to D
• Drinking water qualityD to F
• Pesticide useD to F
• Neighborhood health statusC to F
• Past wildfire impactsA
• Past flood impactsC to F
• Noise levelsA to D
• Radiation signalsD

Based on 9 census tracts · compiled September 10, 2026 · how each grade works and its sources

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