Hazel Crest Water Hardness & Quality Report (2026)

The village of Hazel Crest, located in Cook County, Illinois, receives its water from a municipal utility. This supply is drawn from regional sources common to the Chicago area, integrating both surface water from the Lake Michigan watershed and groundwater from local aquifers. The water undergoes treatment at facilities designed to meet the needs of the village's residential and commercial customers. The geological underpinnings of the Hazel Crest water supply are defined by the Ordovician and Silurian dolomite and limestone bedrock found throughout the region. These highly soluble carbonate rock formations are the primary reason for the elevated levels of calcium and magnesium naturally present in the water as it moves through the earth. This characteristic geology, typical of the Illinois basin and influenced by ancient glacial activity, imbues the local water with a significant mineral content, classifying it as very hard. Dealing with water of this mineral content often means frequent attention to household appliances. Scale buildup, a common consequence of very hard water, can significantly diminish the efficiency and lifespan of devices like water heaters, dishwashers, and washing machines. Homeowners will likely find that soaps and detergents don't lather as easily, necessitating the use of larger quantities to achieve effective cleaning. Installing a water softener is a practical step many residents take to combat these issues, reducing long-term maintenance expenses and enhancing the quality of water for everyday tasks. Recent reports indicate that Hazel Crest's tap water has had 7 contaminants exceed EPA health guidelines, prompting the utility to issue annual Consumer Confidence Reports.