Clark County, WA

ZIP 98601

In ZIP 98601, 2 of the 12 things we check have at least one part graded D or F.

• Drinking water: Yacolt has 1 contaminant at or over an EPA legal limit; 6 contaminants are above health goals, led by pfoa at 471× California’s Public Health Goal.
• Closer to Superfund sites than 0% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Gunderson LLC (63%), mostly nickel.
• Fine particles (PM2.5) average 5.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 19,335 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 98601

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

Based on 3 census tracts · compiled October 25, 2026 · how each grade works and its sources

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