Stevens County, WA

ZIP 99173

In ZIP 99173, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Stevens Co Pud - Loon Lake meets every EPA legal limit; 5 contaminants are above health goals, led by lead at 32× California’s Public Health Goal.
• Closer to Superfund sites than 54% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Spokane Industries (82%), 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 99173

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

Based on 4 census tracts · compiled September 10, 2026 · how each grade works and its sources

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