Lewis County, WA

ZIP 98531

In ZIP 98531, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Sandra Avenue 627 meets every EPA legal limit; 2 contaminants are above health goals, led by pfos at 3.8× California’s Public Health Goal.
• Nearest Superfund site: American Crossarm & Conduit Co., 1.4 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Imperial Group Manufacturing (66%), mostly chromium.
• Fine particles (PM2.5) average 4.8 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 98531

• Superfund sites nearbyC to F
• Factories and industrial sitesB to C
• Oil and gas wellsA to D
• Parks and nature nearbyC to F
• Air qualityA
• Drinking water qualityA to F
• Pesticide useC to F
• Neighborhood health statusC to F
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsB to C

Based on 12 census tracts · compiled September 10, 2026 · how each grade works and its sources

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