| Business | Phone |
| American Water Source Po Box 9548, Naperville 60567 | (630) 778-9900 |
| Ameridyne 2835 Aurora Ave 115, Naperville 60540 | (630) 240-4488 |
| Assured H2o Svc 27w160 West St, Naperville 60565 | (630) 544-3744 |
| Best Purification Systems 4s100 Route 59, Naperville 60563 | (630) 393-9651 |
| Ecowater Systems 1270 Frontenac Rd, Naperville 60563 | (630) 778-1349 |
| Daly Filter Technologies 942 E Hillside Rd, Naperville 60540 | (630) 355-1550 |