Darke County, OH

ZIP 45303

In ZIP 45303, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Greenville City Pws meets every EPA legal limit; 10 contaminants are above health goals, led by lead at 323× 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: The Andersons Marathon Holdings LLC - Greenville Facility (35%), mostly acrolein.
• Fine particles (PM2.5) average 8.4 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 303,540 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 45303

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

Based on 3 census tracts · compiled October 25, 2026 · how each grade works and its sources

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