Mercer County, OH

ZIP 45310

In ZIP 45310, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: St Henry Village meets every EPA legal limit; 10 contaminants are above health goals, led by arsenic at 1,496× 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 (36%), mostly acrolein.
• Fine particles (PM2.5) average 8.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 230,145 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 45310

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

Based on 2 census tracts · compiled September 10, 2026 · how each grade works and its sources

Loading the full report, with every source…