| A & C Water Distributors | 630-552-8200 | 122 Kirkland Cir | Plano | IL | 60545 |
| Aba Irrigation | 630-584-6666 | 585 Gundersen Dr | Carol Stream | IL | 60188 |
| Amer Water Systems | 630-769-1300 | 5201 Thatcher Rd | Downers Grove | IL | 60515 |
| Aurora Magik-Soft Water Co | 630-898-8800 | 1005 Brouch Ln | Aurora | IL | 60504 |
| Brita Water Filter Systems | 630-505-7077 | 1250 E Diehl Rd | Naperville | IL | 60563 |
| Citizens Utilities Of Illinois Water Co Admini | 630-628-2626 | 315 S Stewart Ave | Addison | IL | 60101 |
| Culligan Dupage Water Conditi | 630-668-4100 | 120 Bridge St | Wheaton | IL | 60187 |
| Culligan Industrial Water Co | 630-241-9950 | 320 W 194th St | Downers Grove | IL | 60515 |
| D & L Water Purification Systems | 630-830-0908 | 5889 E Andover Dr | Hanover Park | IL | 60103 |
| Dupage Pure Water Co | 630-293-7500 | 27 W 250 North Ave | West Chicago | IL | 60185 |
| Dupage Soft Water Co | 630-964-5300 | 27 W 250 North Ave | West Chicago | IL | 60185 |
| Dupage Soft Water Co | 630-668-9135 | 27 W 250 North Ave | West Chicago | IL | 60185 |
| Ecowater-Water Options | 630-513-6800 | 1870 Dean St | Saint Charles | IL | 60174 |
| Everpure Inc | 630-654-4000 | 660 Blackhawk Dr | Westmont | IL | 60559 |
| Everpure Midwest | 630-325-2322 | 808 Burr Oak Dr | Westmont | IL | 60559 |
| Gajda Technologies | 630-543-4990 | 625 W Factory Rd | Addison | IL | 60101 |
| Hinckley & Schmitt Drinking Water Systems | 630-858-4600 | 550 Windy Point Dr | Glendale Heights | IL | 60139 |
| Infilco Degremont Inc | 630-293-3960 | 150 Houston St | Batavia | IL | 60510 |
| Liquitech Inc | 630-655-0331 | 649 Executive Dr | Hinsdale | IL | 60521 |
| Marah Water Systems Inc | 630-420-7447 | 27 W 111 95th St | Naperville | IL | 60565 |
| Molitor Grounds Maintenance Inc | 630-393-4750 | 30 W 280 Youghal Rd | Warrenville | IL | 60555 |
| Pitz N L Wells | 630-879-1243 | 1103 Main St | Batavia | IL | 60510 |
| Pure Waters Distillers | 630-739-0399 | 587 Miner Dr | Bolingbrook | IL | 60440 |
| Ross Enterprises-Bon Del Filters | 630-834-3027 | 120 E Natoma Ave | Addison | IL | 60101 |
| Shaklee | 630-420-2119 | 29 W 109 Springlk Dr | Naperville | IL | 60566 |
| Sprinkler Irrigation Golf Division | 630-543-0351 | 849 S Westwood Ave | Addison | IL | 60101 |
| Subdivision Water Trust # 1 | 630-851-8740 | 539 S Farnsworth Ave | Aurora | IL | 60505 |
| Supreme Water Conditioning | 630-466-9785 | 91 Sugar Ln | Sugar Grove | IL | 60554 |
| Valley Clean Water C | 630-859-8380 | 423 Weston Ave | Aurora | IL | 60505 |
| Warthen Gary | 630-739-7259 | Downers Grove Twp | Lemont | IL | 60439 |
| Water Tek Services Inc | 630-963-5999 | 4805 Highland Ave | Downers Grove | IL | 60515 |
| Weber Raymond L Electric & Water Supply Eqpt | 630-232-2866 | 1 N 780 Kautz Rd | West Chicago | IL | 60185 |
| Western Irrigation | 630-653-3937 | 3 N 711 Morton Rd | Carol Stream | IL | 60100 |
