Fox Lake Water Hardness & Quality Report (2026)

Fox Lake, Illinois, a village in Lake County, draws its drinking water from groundwater. Four active wells – #1, #2, #4, and #5 – tap into shallow sand and gravel aquifers, part of the Illinois glacial drift formation. The Water and Sewer Department manages the supply, which is overseen by the Illinois EPA. This groundwater naturally picks up minerals as it filters through the earth. While Wells #1 and #2 are not susceptible to contamination, the source water for Well #4 has known vulnerabilities. The utility treats the water to meet federal drinking water standards, providing annual reports to residents.

The water originates from shallow sand and gravel aquifers located within the Illinois glacial drift. This geological setting means the groundwater naturally dissolves minerals and, occasionally, radioactive materials as it flows through the subsurface. The presence of these naturally occurring minerals is typical for glacial drift aquifers found in northern Illinois. The geology directly influences the mineral composition of the water delivered to homes and businesses.

Homeowners might notice how this mineral-rich water interacts with their plumbing systems and fixtures. The Water and Sewer Department suggests that residents consider evaluating their household pipes for potential corrosion. If you're curious about your specific water quality or if treatment is needed, a water test or a chat with the department can offer guidance on whether point-of-use or whole-house systems are beneficial. The utility also monitors for contaminants like combined radium and cis-1,2-dichloroethylene, keeping levels below federal limits.