King County, WA

ZIP 98047

In ZIP 98047, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Sumner City Of meets every EPA legal limit; 6 contaminants are above health goals, led by arsenic at 473× California’s Public Health Goal.
• Nearest Superfund site: Midway Landfill, 8.1 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Puget Sound Coatings (40%), mostly diisocyanates.
• Fine particles (PM2.5) average 6.6 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 98047

• Superfund sites nearbyC to D
• Factories and industrial sitesC to D
• Oil and gas wellsB
• Parks and nature nearbyC
• Air qualityA
• Drinking water qualityB to C
• Pesticide useA to B
• Neighborhood health statusB to C
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsA

Based on 4 census tracts · compiled October 25, 2026 · how each grade works and its sources

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