Kitsap County, WA

ZIP 98340

In ZIP 98340, 1 of the 12 things we check have at least one part graded D or F.

• Drinking water: Suquamish meets every EPA legal limit; 7 contaminants are above health goals, led by arsenic at 417× California’s Public Health Goal.
• Nearest Superfund site: Bangor Ordnance Disposal (usnavy), 9.4 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Alaskan Copper Works (25%), mostly chromium compounds.
• Fine particles (PM2.5) average 5.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 4,384 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 98340

• Superfund sites nearbyC
• Factories and industrial sitesB
• Oil and gas wellsC to D
• Parks and nature nearbyB to C
• Air qualityA
• Drinking water qualityA to C
• Pesticide useA
• Neighborhood health statusC
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA
• Radiation signalsA

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

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