King County, WA

ZIP 98133

In ZIP 98133, 2 of the 12 things we check have at least one part graded D or F.

• Drinking water: Seattle Public Utilities meets every EPA legal limit; 9 contaminants are above health goals, led by pfoa at 257× 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: Alaskan Copper Works (30%), mostly chromium compounds.
• Fine particles (PM2.5) average 6.6 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 98133

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

Based on 19 census tracts · compiled October 25, 2026 · how each grade works and its sources

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