Antioch

Aurora, Public Properties Department, Water & Sewer Maintenance Division

Bartlett

Batavia, Public Works

Bloomingdale, Village Services Department - Utilities Division

Bolingbrook

Buffalo Grove

Cambridge

Carbon Hill

Central Lake County Joint Action Water Agency

Chicago Department of Water

Chillicothe

Citizens Utilities

Consumers Illinois Water Company

Glen Ellyn Heights Water Supply

Greene Road

Steeple Run Water System

York Center Water System

Decatur

Dewy PWD

Dixon Water Department

Downers Grove, Public Works, Water Department

DuPage Water Commission

Effingham

Elgin Water Department

Park City Mobile Home Park

Forsyth

Glen Ellyn

The Gurnee

Highland Park

Illinois-American Water Company

American Water Works Company, Inc.

Imperial Valley Water Authority

Lake Forest Water Plant

LaSalle Water Department

Marseilles

Minooka

Moline Water

Morton

Normal Water Department

Naperville, Department of Public Utilities

North Aurora

Oak Forest: Water Department

LaSalle County Nursing Home

Palatine

Paris

Park Forest

Quincy

Rantoul

Rochelle Municipal Utilities

Rockford, Water Division

Stickney Water Department

Villa Park

Westmont

Wheaton

Wheeling

Citizens Utilites Company