Lake County, IN

ZIP 46312

In ZIP 46312, 10 of the 12 things we check have at least one part graded D or F.

• Drinking water: Hammond Water Works Department meets every EPA legal limit; 9 contaminants are above health goals, led by lead at 13× California’s Public Health Goal.
• Nearest Superfund site: U.s. Smelter and Lead Refinery, Inc., 1.8 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Cleveland-Cliffs Steel LLC (33%), mostly chromium compounds.
• Fine particles (PM2.5) average 8.9 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 46312

• Superfund sites nearbyF
• Factories and industrial sitesF
• Oil and gas wellsD
• Parks and nature nearbyD to F
• Air qualityD to F
• Drinking water qualityD
• Pesticide useD to F
• Neighborhood health statusD to F
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsD

Based on 11 census tracts · compiled September 10, 2026 · how each grade works and its sources

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