Lewis County, WA

ZIP 98570

In ZIP 98570, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Salkum Water Supply meets every EPA legal limit; 2 contaminants are above health goals, led by lead at 87× California’s Public Health Goal.
• Nearest Superfund site: Hamilton/labree Roads Gw Contamination, 9.2 miles away.
• Largest share of modeled toxic air from industry: Imperial Group Manufacturing (78%), mostly chromium.
• Fine particles (PM2.5) average 5.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 26,101 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 98570

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

Based on 3 census tracts · compiled September 10, 2026 · how each grade works and its sources

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