King County, WA

ZIP 98052

In ZIP 98052, 2 of the 12 things we check have at least one part graded D or F.

• Drinking water: Union Hill Water Association Inc meets every EPA legal limit; 2 contaminants are above health goals, led by arsenic at 906× 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: Western Pneumatic Tube Co LLC (32%), mostly nickel.
• Fine particles (PM2.5) average 6.4 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 17,223 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 98052

• Superfund sites nearbyA
• Factories and industrial sitesB to D
• Oil and gas wellsA to C
• Parks and nature nearbyB to C
• Air qualityA
• Drinking water qualityC
• Pesticide useA to C
• Neighborhood health statusA
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsA

Based on 14 census tracts · compiled October 25, 2026 · how each grade works and its sources

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