Washington County, OR

ZIP 97140

In ZIP 97140, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: Oxberg Water System #1 meets every EPA legal limit; 1 contaminant is above health goals, led by lead at 40× California’s Public Health Goal.
• Closer to Superfund sites than 0% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Gunderson LLC (90%), mostly nickel.
• Fine particles (PM2.5) average 8.6 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 143,340 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 97140

• Superfund sites nearbyA
• Factories and industrial sitesC to D
• Oil and gas wellsA
• Parks and nature nearbyC to D
• Air qualityA to D
• Drinking water qualityD to F
• Pesticide useD to F
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsC to D

Based on 13 census tracts · compiled September 10, 2026 · how each grade works and its sources

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