Multnomah County, OR

ZIP 97227

In ZIP 97227, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Portland Water Bureau meets every EPA legal limit; 4 contaminants are above health goals, led by arsenic at 194× California’s Public Health Goal.
• Nearest Superfund site: Mccormick & Baxter Creosoting Co. (portland Plant), 2.4 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Gunderson LLC (99%), mostly nickel.
• Fine particles (PM2.5) average 8.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 44,620 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 97227

• Superfund sites nearbyD to F
• Factories and industrial sitesF
• Oil and gas wellsA
• Parks and nature nearbyB to C
• Air qualityC to D
• Drinking water qualityC
• Pesticide useB to C
• Neighborhood health statusA to B
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsB to D
• Radiation signalsC

Based on 5 census tracts · compiled October 25, 2026 · how each grade works and its sources

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