| Business | Phone |
| Global Environmental Tech Inc 1001 S 10th St, Allentown 18103 | (610) 821-4901 |
| Miracle Water Conditioning Inc 5201 Hamilton Blvd, Allentown 18106 | (610) 395-2005 |
| Nuchem Corp 747 N Fenwick St, Allentown 18109 | (610) 770-2000 |
| Water System Consultants 40 S 13th St, Allentown 18102 | (610) 434-5089 |