Hamilton County, OH

ZIP 45255

In ZIP 45255, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Clermont Public Water System has 1 contaminant at or over an EPA legal limit; 12 contaminants are above health goals, led by pfos at 4× California’s Public Health Goal.
• Nearest Superfund site: Milford Contaminated Aquifer, 7.0 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Hamilton Custom Made Security (50%), mostly chromium.
• Fine particles (PM2.5) average 8.6 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 67,657 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 45255

• Superfund sites nearbyA to C
• Factories and industrial sitesD
• Oil and gas wellsA
• Parks and nature nearbyB to C
• Air qualityD
• Drinking water qualityC to D
• Pesticide useA to D
• Neighborhood health statusB to F
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA
• Radiation signalsD

Based on 8 census tracts · compiled October 25, 2026 · how each grade works and its sources

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