Chlorine is the disinfecting agent used by most public water systems to kill bacteria during the water treatment process. A small amount is left in the water right up to your tap to inhibit microbial growth in the piping. This amount can vary with the time of year and the condition of raw Lake Michigan water.
To remove the chlorine taste or smell, fill a clean pitcher or container with cold tap water and leave it uncovered overnight in the refrigerator. The chlorine content will dissipate.