King County, WA

ZIP 98058

In ZIP 98058, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Maplewood Addition Water Coop meets every EPA legal limit; 8 contaminants are above health goals, led by pfos at 3.2× California’s Public Health Goal.
• Nearest Superfund site: Queen City Farms, 1.0 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Puget Sound Coatings (48%), mostly diisocyanates.
• Fine particles (PM2.5) average 6.8 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 98058

• Superfund sites nearbyD to F
• Factories and industrial sitesC to F
• Oil and gas wellsA to C
• Parks and nature nearbyC to F
• Air qualityA to B
• Drinking water qualityC to F
• Pesticide useB to C
• Neighborhood health statusA to C
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to C
• Radiation signalsB

Based on 19 census tracts · compiled September 10, 2026 · how each grade works and its sources

Loading the full report, with every source…