Snohomish County, WA

ZIP 98252

In ZIP 98252, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Roseland Community Club Association has 2 contaminants at or over an EPA legal limit; 4 contaminants are above health goals, led by pfos at 4.7× California’s Public Health Goal.
• Nearest Superfund site: Tulalip Landfill, 9.5 miles away.
• Largest share of modeled toxic air from industry: Hf Sinclair Puget Sound Refining LLC (57%), mostly sulfuric acid.
• Fine particles (PM2.5) average 5.6 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 36,222 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 98252

• Superfund sites nearbyA to C
• Factories and industrial sitesA to B
• Oil and gas wellsA to B
• Parks and nature nearbyB to C
• Air qualityA
• Drinking water qualityB to F
• Pesticide useC to D
• Neighborhood health statusC to D
• Past wildfire impactsA to D
• Past flood impactsA
• Noise levelsA
• Radiation signalsB

Based on 7 census tracts · compiled September 10, 2026 · how each grade works and its sources

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