Lake County, IN

ZIP 46307

In ZIP 46307, 10 of the 12 things we check have at least one part graded D or F.

• Drinking water: Cuii - Twin Lakes meets every EPA legal limit; 7 contaminants are above health goals, led by lead at 36× California’s Public Health Goal.
• Nearest Superfund site: American Chemical Service, Inc., 1.3 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Tms International LLC (42%), mostly chromium compounds.
• Fine particles (PM2.5) average 8.1 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 46307

• Superfund sites nearbyA to F
• Factories and industrial sitesB to D
• Oil and gas wellsA to D
• Parks and nature nearbyC to F
• Air qualityB to D
• Drinking water qualityB to F
• Pesticide useD to F
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsC to D

Based on 26 census tracts · compiled September 10, 2026 · how each grade works and its sources

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