Benton County, OR

ZIP 97331

In ZIP 97331, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Corvallis, City Of meets every EPA legal limit; 6 contaminants are above health goals, led by bromodichloromethane at 55× California’s Public Health Goal.
• Nearest Superfund site: United Chrome Products, Inc., 4.1 miles away.
• Largest share of modeled toxic air from industry: Cascade Pacific Pulp Halsey Pulp Mill (88%), mostly formaldehyde.
• Fine particles (PM2.5) average 5.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 47,272 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 97331

• Superfund sites nearbyD
• Factories and industrial sitesC
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityA
• Drinking water qualityC
• Pesticide useC to D
• Neighborhood health statusA
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsD
• Radiation signalsB

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

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