Village of Addison
Village of Bartlett
Village of Bloomingdale
Village of Carol Stream
City of Darien
City of Elmhurst
Village of Glendale Heights
Village of Hanover Park
City of Naperville
Village of Lisle
Village of Oak Brook
Village of Roselle
Village of Villa Park
Village of Wayne
Village of Westmont
Village of Willowbrook
Village of Winfield
Village of Woodridge
City of Aurora
Village of Bensenville
Village of Bolingbrook
Village of Burr Ridge
Village of Clarendon Hills
Village of Downers Grove
Village of Glen Ellyn
Village of Hinsdale
Village of Itasca
Village of Lemont
Village of Lombard
City of Oakbrook Terrace
Village of Schaumburg
City of Warrenville
City of West Chicago
City of Wheaton
City of Wood Dale
Associate Membership
Village of Western Springs