St. Joseph County, IN

ZIP 46554

In ZIP 46554, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Hamilton Grove meets every EPA legal limit; 7 contaminants are above health goals, led by bromodichloromethane at 81× California’s Public Health Goal.
• Nearest Superfund site: Whiteford Sales & Service Inc./nationalease, 4.8 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Kennametal Stellite LP (84%), mostly cobalt.
• Fine particles (PM2.5) average 7.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 144,822 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 46554

• Superfund sites nearbyA to D
• Factories and industrial sitesA to C
• Oil and gas wellsA
• Parks and nature nearbyB to C
• Air qualityA to B
• Drinking water qualityA to C
• Pesticide useF
• Neighborhood health statusC to F
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA
• Radiation signalsB to C

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

Loading the full report, with every source…