Frankfort Water Hardness & Quality Report (2026)

Frankfort Water Company serves approximately 22,150 residents in Frankfort, Illinois, located in Will County, a southern suburb of Chicago. The utility sources all drinking water from groundwater wells; no named specific aquifer or treatment plant is detailed in available reports. The system complies with standard EPA monitoring requirements, with groundwater undergoing disinfection — likely chlorination — and monitoring for contaminants including nitrate, nitrite, Dacthal, 1,1-Dichloroethylene, and caffeine. For service inquiries, the utility is located at 432 W Nebraska Street, Frankfort, IL 60423, reachable at 815-469-2177.

Frankfort's groundwater draws from aquifers in Will County influenced by glacial drift and Paleozoic bedrock formations typical of northern Illinois. The area overlies soluble Silurian Niagaran Series dolomites and Devonian Edgewood Limestone — both rich in calcium and magnesium carbonates — which dissolve as groundwater percolates through, imparting high mineral content. Glacial till and sand aquifer layers overlay the bedrock, channeling water through mineral-laden strata and producing a characteristically very hard supply with elevated dissolved solids and no softening influences.

Very hard water in Frankfort causes significant scale buildup in pipes, water heaters, dishwashers, washing machines, and showerheads, reducing efficiency and lifespan; white deposits on fixtures and reduced hot water output are common complaints. Maintenance includes regular vinegar cleaning of aerators, annual appliance descaling, and installing sediment filters; a water softener is strongly recommended to protect plumbing and reduce cleaning demands. Residents should consult annual CCRs on the city site for the latest pH, lead, copper, and PFAS metrics, as no specific data was available in current reports.