Jefferson County, WA

ZIP 98365

In ZIP 98365, 1 of the 12 things we check have at least one part graded D or F.

• Drinking water: Olympic Water & Sewer Inc meets every EPA legal limit; 6 contaminants are above health goals, led by arsenic at 1,039× California’s Public Health Goal.
• Nearest Superfund site: Bangor Ordnance Disposal (usnavy), 9.0 miles away.
• Largest share of modeled toxic air from industry: Alaskan Copper Works (26%), mostly chromium compounds.
• Fine particles (PM2.5) average 5.4 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 2,723 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 98365

• Superfund sites nearbyA to C
• Factories and industrial sitesA to B
• Oil and gas wellsA
• Parks and nature nearbyB
• Air qualityA
• Drinking water qualityA to C
• Pesticide useB to C
• Neighborhood health statusD
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to C
• Radiation signalsA

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

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