| Business | Phone |
| Nalco Co 465 Lancaster St, Leominster 1453 | (978) 537-4500 |
| Us Filter Operations Inc 300 Exchange, Leominster 1453 | (978) 537-8691 |
| Us Filter Operations Inc Off Mechanic, Leominster 1453 | (978) 537-5720 |
| Cadel Chemical & Supply Co 245 Elm St, Leominster 1453 | (978) 840-6930 |