King County, WA

ZIP 98070

In ZIP 98070, 2 of the 12 things we check have at least one part graded D or F.

• Drinking water: Water District 19 has 1 contaminant at or over an EPA legal limit; 8 contaminants are above health goals, led by arsenic at 5,859× California’s Public Health Goal.
• Nearest Superfund site: Commencement Bay, Near Shore/tide Flats, 6.5 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Puget Sound Coatings (33%), mostly diisocyanates.
• 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 98070

• Superfund sites nearbyD
• Factories and industrial sitesB
• Oil and gas wellsA
• Parks and nature nearbyB
• Air qualityA
• Drinking water qualityA to F
• Pesticide useA
• Neighborhood health statusC
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA

Based on 2 census tracts · compiled October 25, 2026 · how each grade works and its sources

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