Cowlitz County, WA

ZIP 98626

In ZIP 98626, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Pleasant Hill Terrace Subdivision meets every EPA legal limit; 3 contaminants are above health goals, led by arsenic at 800× 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: Emerald Kalama Chemical LLC (79%), mostly cobalt compounds.
• Fine particles (PM2.5) average 6.3 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 98626

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

Based on 12 census tracts · compiled October 25, 2026 · how each grade works and its sources

Loading the full report, with every source…