Buffalo Grove, IL uses surface water. This water is pumped from Lake Michigan to a treatment plant in Evanston, Illinois. The city of Evanston is the sole supplier of the treated, finished water. Evanston’s treatment plant uses conventional treatment (i.e. mixing, flocculation, sedimentation and filtration).
Once treated, the finished water is purchased from the treatment plant by the Northwest Water Commission. The water is then transported through a 60 inch water transmission main to a 25 million gallon reservoir at the Commission’s main pumping station. The main pumping station then pumps the finished water out into the Commission’s distribution system and on to the Village of Buffalo Grove’s four receiving reservoirs. At each of the four receiving stations, the finished water is monitored and additional chlorine is added (if necessary) to aid in protecting against microbial contaminants before it is then pumped into Buffalo Grove’s distribution system where it is sent directly to homes and businesses through water mains.
Website: www.vbg.org/
Wikipedia: https://en.wikipedia.org/wiki/Buffalo_Grove,_Illinois