Utilities Utilities Search | Advanced Search | New Members | Coupons and Discounts | All Categories Sort alphabetically by... Name City CALPINE ENERGY SOLUTIONS _ 1901 Butterfield Rd.Downers Grove, IL 60515 (954) 461-6964 Member Since: 2023 Learn More | Visit Site | Show on Map GREENBEE ENERGY EFFICIENCY _ 650 Warrenville Rd., Suite 100Lisle, IL 60532 (630) 637-0286 Member Since: 2019 Learn More | Visit Site | Show on Map ILLINOIS AMERICAN WATER _ 1000 Internationale ParkwayWoodridge, IL 60517 (630) 739-8864 Member Since: 2006 We serve approximately 1.2 million people, supplying high quality water and wastewater service. We take pride in taking care of water because it is such an integral part of life. Learn More | Visit Site | Show on Map NICOR GAS _ 1844 W. Ferry Rd.Naperville, IL 60563 (888) 642-6748 Member Since: 2007 Learn More | Visit Site | Show on Map If your business isn't here, contact us today to get listed!