Lewis County, WA

ZIP 98591

In ZIP 98591, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Napavine City Of has 1 contaminant at or over an EPA legal limit; 7 contaminants are above health goals, led by pfos at 7× California’s Public Health Goal.
• Nearest Superfund site: Hamilton/labree Roads Gw Contamination, 6.2 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Nippon Dynawave Packaging Co. (24%), mostly acetaldehyde.
• Fine particles (PM2.5) average 5.2 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 98591

• Superfund sites nearbyA to D
• Factories and industrial sitesA
• Oil and gas wellsC to D
• Parks and nature nearbyC
• Air qualityA
• Drinking water qualityA to D
• Pesticide useC to D
• Neighborhood health statusD to F
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA
• Radiation signalsA

Based on 4 census tracts · compiled October 25, 2026 · how each grade works and its sources

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