Darke County, OH

ZIP 45304

In ZIP 45304, 9 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.
• Nearest Superfund site: United Scrap Lead Co., Inc., 8.5 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Parker Hannifin Lewisburg Plant (81%), mostly chromium.
• Fine particles (PM2.5) average 8.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 216,399 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 45304

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

Based on 6 census tracts · compiled October 25, 2026 · how each grade works and its sources

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