Boone County, MO

ZIP 65203

In ZIP 65203, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: City Of Columbia Utilities meets every EPA legal limit; 17 contaminants are above health goals, led by pfos at 1.8× 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: Hitachi Energy USA Inc. (92%), mostly cobalt.
• Fine particles (PM2.5) average 7.9 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 72,894 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 65203

• Superfund sites nearbyA
• Factories and industrial sitesC
• Oil and gas wellsA
• Parks and nature nearbyC to F
• Air qualityB to D
• Drinking water qualityD to F
• Pesticide useD to F
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to C
• Radiation signalsC to D

Based on 17 census tracts · compiled September 10, 2026 · how each grade works and its sources

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