Hardin County, OH

ZIP 43326

In ZIP 43326, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Aqua Ohio - Marion meets every EPA legal limit; 11 contaminants are above health goals, led by bromodichloromethane at 141× California’s Public Health Goal.
• Nearest Superfund site: Little Scioto River, 4.1 miles away.
• Largest share of modeled toxic air from industry: Whirlpool Corp Marion Operations (38%), mostly diisocyanates.
• Fine particles (PM2.5) average 7.9 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 190,046 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 43326

• Superfund sites nearbyA to D
• Factories and industrial sitesA to C
• Oil and gas wellsB to F
• Parks and nature nearbyC to F
• Air qualityC to D
• Drinking water qualityC
• Pesticide useF
• Neighborhood health statusF
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to C
• Radiation signalsF

Based on 7 census tracts · compiled October 25, 2026 · how each grade works and its sources

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