The following organizations are members of InWARN:

MemberMAA on File
Aqua Indiana - Fort Wayne Yes
Bainbridge Utilties Yes
Brownstown Wastewater Utility Yes
Carmel Wastewater Utility Yes
Carmel Water Utility Yes
Central REOC No
City of Huntingburg Yes
City of LaPorte Water Department Yes
City of New Castle Yes
City of New Haven Yes
City of Westfield Yes
Clay Township Regional Waste District Yes
Columbus City Utilities Yes
Decatur County Rural Water Corp Yes
Dupont Water Co. Inc. Yes
Elkhart Public Works and Utilities Yes
Elwood Water No
Evansville Water and Sewer Utility Yes
Goshen Utilities Yes
Greeley and Hansen No
Hammond Water Works Department Yes
Indiana Ameican Water - Kokomo Yes
Indiana American Water - Crawfordsville Yes
Indiana American Water - Greenwood Yes
Indiana American Water - Mooresville Yes
Indiana American Water - Muncie Yes
Indiana American Water - Noblesville Yes
Indiana American Water - Northwest Yes
Indiana American Water - Shelbyville Yes
Indiana American Water - Terre Haute Yes
Indiana American Water - Wabash Yes
Indiana American Water - Wabash Valley District Yes
Indiana American Water - West Lafayette Yes
Indiana Association of Cities and Towns No
Indiana Department of Environmental Management No
Indianapolis Water Yes
Jasper Municipal Wastewater Utility Yes
Kirklin Utilities Yes
LMH Utilities Yes
Logansport Municipal Utilities Yes
Michigan City Department of Water Works Yes
Mulberry Municipal Utilities No
Nappanee City Utilities Yes
New Paris Conservacy District Yes
Newburgh Sewer Dept. Yes
Northern REOC No
Sharpsville Utilities Yes
Silver Creek Water Corporation No
South Bend Wastewater Yes
South Bend Water Works Yes
Town of Bremen Yes
Town of Culver Yes
Town of Danville Yes
Town of Hamilton Water Utility No
Town of Shipshewana Yes
Town of Topeka Yes
Town of Wakarusa Yes
Town of Winamac Yes
Tri-Township Water Corporation Yes
Valparaiso City Utilities Yes