Thurston County, WA

ZIP 98505

In ZIP 98505, 2 of the 12 things we check have at least one part graded D or F.

• Drinking water: Olympia City Of has 2 contaminants at or over an EPA legal limit; 10 contaminants are above health goals, led by pfos at 4.3× California’s Public Health Goal.
• Nearest Superfund site: Palermo Well Field Ground Water Contamination, 5.4 miles away.
• Largest share of modeled toxic air from industry: Kloeckner Metals Corp (94%), mostly chromium.
• Fine particles (PM2.5) average 5.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 11,135 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 98505

• Superfund sites nearbyD
• Factories and industrial sitesB
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityA
• Drinking water qualityC to F
• Pesticide useC
• Neighborhood health statusB
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA
• Radiation signalsB

Based on 1 census tract · compiled September 10, 2026 · how each grade works and its sources

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