Sauk Village Water Hardness & Quality Report (2026)

Sauk Village Water Department provides drinking water to about 9,921 residents in Cook County, Illinois. Their supply comes from three groundwater wells, two situated at 2217 220th Street and one at 2050 Evergreen Avenue. These wells tap into deep sandstone formations roughly 500 feet beneath the surface. The utility operates under the watchful eyes of the Illinois EPA and the Illinois Department of Public Health, regularly publishing Consumer Confidence Reports that lay out water quality details. The Sauk Village water system draws from a deep sandstone aquifer, a common source across Illinois.

The geological makeup of this region significantly influences the water's characteristics. The deep sandstone formations are known for imparting a naturally hard quality to the groundwater. According to the Illinois EPA, the source water faces a high risk of contamination due to its location, geological conditions, and hydrogeologic data. However, the risk of viral contamination is deemed low under the Ground Water Rule. This deep sandstone aquifer is typical for Illinois groundwater supplies, contributing to the characteristic hardness.

With water hardness at the very hard level common for Illinois groundwater, residents of Sauk Village might notice mineral scale building up on faucets and shower heads. This can also reduce the effectiveness of soaps and detergents and potentially affect the lifespan of water heaters and other appliances. Many homeowners opt for water softening systems to lessen these effects and prolong appliance life, though this is a matter of personal preference rather than a health mandate. Sauk Village is monitoring vinyl chloride in its source water wells, which has been detected below the federal standard but is approaching the limit, prompting weekly sampling by the Illinois EPA.