Chicago Ridge Water Hardness & Quality Report (2026)

The Village of Chicago Ridge Water Supply System provides water to about 14,305 residents in Chicago Ridge, Illinois. This system purchases treated surface water from the City of Chicago. The sole source is Lake Michigan, with raw water drawn through intakes located offshore and nearshore. Chicago operates two major water treatment facilities, the Jardine Water Purification Plant and the South Water Purification Plant, which process the water using conventional methods like screening, coagulation, sedimentation, filtration, and disinfection before it reaches Chicago Ridge.

The water's journey begins in the Lake Michigan watershed, part of the vast Great Lakes basin. Beneath the surface lie Paleozoic sedimentary rocks, including Silurian dolomite and Devonian limestone. These bedrock formations, along with glacial till and moraines deposited during the Wisconsinan glaciation, contribute significantly to the water's mineral content. As water interacts with these carbonate-rich soils and rock layers, it dissolves calcium and magnesium ions, resulting in a naturally hard water supply. This geological makeup is typical for the region, influencing the water's overall mineral profile.

This naturally hard water can lead to scale buildup in appliances like water heaters, dishwashers, and washing machines, potentially reducing their efficiency and lifespan. Homeowners might notice poorer lathering from soaps and detergents, leading to soap scum on fixtures and less effective laundry cleaning. Regular maintenance, such as flushing hot water systems and using vinegar for descaling, can help. For persistent issues, installing a water softener is often recommended to mitigate these effects and improve cleaning performance. The Chicago supply, which Chicago Ridge receives, generally meets federal safety standards, though minor concerns like disinfection byproducts and mineral content are monitored.