Spokane County, WA

ZIP 99203

In ZIP 99203, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Spokane City Of meets every EPA legal limit; 7 contaminants are above health goals, led by pfos at 2.5× California’s Public Health Goal.
• Nearest Superfund site: General Electric Co. (spokane Apparatus Service Shop), 5.0 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Spokane Industries (71%), mostly chromium.
• Fine particles (PM2.5) average 8.7 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 196,024 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 99203

• Superfund sites nearbyD
• Factories and industrial sitesB to C
• Oil and gas wellsC
• Parks and nature nearbyB to C
• Air qualityD to F
• Drinking water qualityC
• Pesticide useC
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsC to F

Based on 11 census tracts · compiled October 25, 2026 · how each grade works and its sources

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