Benton County, OR

ZIP 97456

In ZIP 97456, 2 of the 12 things we check have at least one part graded D or F.

• Drinking water: Monroe, City Of meets every EPA legal limit; 6 contaminants are above health goals, led by bromodichloromethane at 172× California’s Public Health Goal.
• Nearest Superfund site: United Chrome Products, Inc., 7.1 miles away.
• Largest share of modeled toxic air from industry: Western Pneumatics LLC (71%), mostly chromium.
• Fine particles (PM2.5) average 6.6 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 81,034 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 97456

• Superfund sites nearbyA to C
• Factories and industrial sitesA
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityA
• Drinking water qualityA to C
• Pesticide useD
• Neighborhood health statusD
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA
• Radiation signalsB to C

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

Loading the full report, with every source…