American Water Works Association   http://www.awwa.org/

American Public Power Association  http://www.appanet.org 

Illinois Municipal Electric Agency  http://www.imea.org 

Illinois Environmental Agency, Water   http://www.epa.state.il.us/water/

Illinois Environmental Agency, Air  http://www.epa.state.il.us/air/

Illinois Municipal Utilities Associate http://www.ilmua.org/Main.aspx