St. Joseph County, IN

ZIP 46637

In ZIP 46637, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: South Bend Water Works has 1 contaminant at or over an EPA legal limit; 18 contaminants are above health goals, led by pfos at 3.4× California’s Public Health Goal.
• Nearest Superfund site: Douglas Road/uniroyal, Inc., Landfill, 1.5 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Kennametal Stellite LP (91%), mostly cobalt.
• Fine particles (PM2.5) average 8.2 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 46637

• Superfund sites nearbyF
• Factories and industrial sitesD
• Oil and gas wellsA
• Parks and nature nearbyD to F
• Air qualityB to D
• Drinking water qualityD to F
• Pesticide useD to F
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to B
• Radiation signalsD

Based on 6 census tracts · compiled September 10, 2026 · how each grade works and its sources

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