Benton County, WA

ZIP 99353

In ZIP 99353, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: West Richland City Of meets every EPA legal limit; 14 contaminants are above health goals, led by pfos at 2.1× California’s Public Health Goal.
• Nearest Superfund site: Hanford 1100-Area (usdoe), 5.4 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Lamb Weston Inc Richland Facility (49%), mostly hydrogen sulfide.
• Fine particles (PM2.5) average 7.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 3,566,627 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 99353

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

Based on 7 census tracts · compiled September 10, 2026 · how each grade works and its sources

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