| Business | Phone |
| United Teachers Of Lowell 169 Merrimack St, Lowell 1852 | (978) 937-9039 |
| Merrimack Valley Central Labor 169 Merrimack St, Lowell 1852 | (978) 441-1939 |
| Seiu Local 159 385 Gorham St, Lowell 1852 | (978) 458-4447 |
| Laborers International Union 40 Old Ferry Rd, Lowell 1854 | (978) 452-7261 |