Spokane County, WA

ZIP 99258

In ZIP 99258, 8 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; 10 contaminants are above health goals, led by pfos at 3.4× California’s Public Health Goal.
• Nearest Superfund site: Spokane Junkyard/associated Properties, 2.3 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Spokane Industries (63%), 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 99258

• Superfund sites nearbyF
• Factories and industrial sitesD
• Oil and gas wellsC
• Parks and nature nearbyF
• Air qualityF
• Drinking water qualityF
• Pesticide useD
• Neighborhood health statusB
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsD
• Radiation signalsD

Based on 1 census tract · compiled September 10, 2026 · how each grade works and its sources

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