Lansing Water Hardness & Quality Report (2026)

Lansing, Illinois, in Cook County — a major south Chicago suburban community (Lansing is a significant Cook County village — a south suburban Chicago community at the Illinois–Indiana border; Lansing is part of the 'Far South Suburbs' cluster of south Cook County communities; Lansing is known for its position at the Illinois–Indiana state line — the Lansing–Dyer, Indiana border area is one of the important Illinois–Indiana suburban interfaces in the south Chicago suburban belt), a diverse Cook County community with a primarily African-American and working-class suburban population (Lansing has seen significant demographic change since the 1990s, with substantial African-American migration from inner south suburban communities), adjacent to Calumet City and Dyer, Indiana in the far south Cook County corridor, home of a significant south suburban retail corridor, and one of the far south Chicago suburban communities shaped by the post-industrial decline of the steel-era south suburban economy — draws its municipal water supply from Lake Michigan via the Illinois American Water Company. Water hardness in Lansing measures 282.5 mg/L — classified as very hard.

Lansing's very hard supply reflects the south Cook County Lake Michigan distribution zone's very limited softening. Illinois American Water distributes Lake Michigan supply to the far south Cook County Lansing zone with very limited softening, producing the very hard 282.5 mg/L.

At 282.5 mg/L, Lansing residents face significant hard water challenges. Regular water softeners and descaling are strongly recommended. Illinois American Water Company consistently delivers water meeting all Illinois EPA and EPA Safe Drinking Water Act requirements.