Franklin County, WA

ZIP 99301

In ZIP 99301, 10 of the 12 things we check have at least one part graded D or F.

• Drinking water: Hi-Point Housing has 1 contaminant at or over an EPA legal limit; 3 contaminants are above health goals, led by arsenic at 3,250× California’s Public Health Goal.
• Nearest Superfund site: Pasco Sanitary Landfill, 1.6 miles away.
• Largest share of modeled toxic air from industry: Tidewater Terminal Co Snake River Terminal (64%), mostly metham sodium (sodium methyldithiocarbamate).
• Fine particles (PM2.5) average 7.9 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 3,707,384 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 99301

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

Based on 21 census tracts · compiled September 10, 2026 · how each grade works and its sources

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