Spokane County, WA

ZIP 99006

In ZIP 99006, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Whitworth Water District 2 has 1 contaminant at or over an EPA legal limit; 6 contaminants are above health goals, led by pfos at 4.2× California’s Public Health Goal.
• Nearest Superfund site: Colbert Landfill, 1.4 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Spokane Industries (79%), mostly chromium.
• Fine particles (PM2.5) average 7.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 40,370 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 99006

• Superfund sites nearbyA to F
• Factories and industrial sitesA to B
• Oil and gas wellsA to C
• Parks and nature nearbyB to C
• Air qualityB to C
• Drinking water qualityC to F
• Pesticide useD to F
• Neighborhood health statusC to F
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to C
• Radiation signalsD to F

Based on 9 census tracts · compiled September 10, 2026 · how each grade works and its sources

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