Okanogan County, WA

ZIP 98827

In ZIP 98827, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: River Road Mobile Home Park meets every EPA legal limit; 4 contaminants are above health goals, led by lead at 78× California’s Public Health Goal.
• Nearest Superfund site: Silver Mountain Mine, 5.5 miles away.
• Fine particles (PM2.5) average 7.6 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 813,147 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 98827

• Superfund sites nearbyA
• Factories and industrial sitesA to B
• Oil and gas wellsA
• Parks and nature nearbyB
• Air qualityC
• Drinking water qualityD to F
• Pesticide useF
• Neighborhood health statusF
• Past wildfire impactsD to F
• Past flood impactsA
• Noise levelsA
• Radiation signalsC

Based on 2 census tracts · compiled September 10, 2026 · how each grade works and its sources

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