Lake County, IN

ZIP 46403

In ZIP 46403, 9 of the 12 things we check have at least one part graded D or F.

• Drinking water: Indiana American Water - Northwest meets every EPA legal limit; 7 contaminants are above health goals, led by lead at 25× California’s Public Health Goal.
• Nearest Superfund site: Lake Sandy Jo (m&m Landfill), 4.3 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Tms International LLC (49%), mostly chromium compounds.
• Fine particles (PM2.5) average 8.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 152,546 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 46403

• Superfund sites nearbyA to F
• Factories and industrial sitesD
• Oil and gas wellsA
• Parks and nature nearbyC to D
• Air qualityC to D
• Drinking water qualityC to D
• Pesticide useD
• Neighborhood health statusC to F
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsB to D
• Radiation signalsD

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

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