Klickitat County, WA

ZIP 98620

In ZIP 98620, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Lyle Water System meets every EPA legal limit; 8 contaminants are above health goals, led by arsenic at 500× California’s Public Health Goal.
• Closer to Superfund sites than 65% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Cardinal Glass (91%), mostly chromium.
• Fine particles (PM2.5) average 5.9 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 231,311 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 98620

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

Based on 4 census tracts · compiled September 10, 2026 · how each grade works and its sources

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