Yakima County, WA

ZIP 98903

In ZIP 98903, 9 of the 12 things we check have at least one part graded D or F.

• Drinking water: Union Gap Water meets every EPA legal limit; 4 contaminants are above health goals, led by pfos at 2.4× California’s Public Health Goal.
• Nearest Superfund site: Fmc Corp. (yakima), 0.9 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Triumph Actuation Systems-Yakima (95%), mostly chromium.
• Fine particles (PM2.5) average 8.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 2,424,406 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 98903

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

Based on 11 census tracts · compiled September 10, 2026 · how each grade works and its sources

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