King County, WA

ZIP 98092

In ZIP 98092, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Covington Water District has 1 contaminant at or over an EPA legal limit; 8 contaminants are above health goals, led by pfos at 4.1× California’s Public Health Goal.
• Nearest Superfund site: Seattle Municipal Landfill (kent Highlands), 3.5 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Puget Sound Coatings (44%), mostly diisocyanates.
• Fine particles (PM2.5) average 6.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 18,075 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 98092

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

Based on 17 census tracts · compiled October 25, 2026 · how each grade works and its sources

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