Washington County, OR

ZIP 97223

In ZIP 97223, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Lake Oswego Municipal Water has 1 contaminant at or over an EPA legal limit; 6 contaminants are above health goals, led by bromate at 840× California’s Public Health Goal.
• Nearest Superfund site: Gould, Inc., 6.5 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Gunderson LLC (95%), mostly nickel.
• Fine particles (PM2.5) average 8.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 156,635 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 97223

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

Based on 14 census tracts · compiled October 25, 2026 · how each grade works and its sources

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