Lake County, IN

ZIP 46311

In ZIP 46311, 9 of the 12 things we check have at least one part graded D or F.

• Drinking water: Cedar Lake Water Works meets every EPA legal limit; 6 contaminants are above health goals, led by lithium at 3.9× the USGS health-based screening level.
• Nearest Superfund site: American Chemical Service, Inc., 3.5 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Tms International LLC (45%), mostly chromium compounds.
• Fine particles (PM2.5) average 8.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 154,031 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 46311

• Superfund sites nearbyC to F
• Factories and industrial sitesC to F
• Oil and gas wellsA to D
• Parks and nature nearbyB to D
• Air qualityC to F
• Drinking water qualityA to C
• Pesticide useC to F
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsC to D

Based on 9 census tracts · compiled October 25, 2026 · how each grade works and its sources

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