| Business | Phone |
| Carpenters Union Local 713 1050 Mattox Rd, Hayward 94541 | (510) 581-7817 |
| Communications Workers-America 29868 Mission Blvd, Hayward 94544 | (510) 581-9412 |
| East Bay Carpet Linoleum 2463 Tripaldi Way, Hayward 94545 | (510) 259-1102 |
| Hayward Firefighters Local 22734 Main St, Hayward 94541 | (510) 885-1909 |
| Hayward Poa 300 W Winton Ave, Hayward 94544 | (510) 293-7207 |
| Ilwu Warehouse Drug & Alchl 22693 Hesperian Blvd, Hayward 94541 | (510) 264-1532 |
| Laborers Local 29475 Mission Blvd, Hayward 94544 | (510) 581-4681 |
| National Assn-Letter Carriers 24301 Southland Dr, Hayward 94545 | (510) 670-8636 |
| Retail Clerks Union-Local 870 28870 Mission Blvd, Hayward 94544 | (510) 889-0880 |
| Sheet Metal Production Union 22693 Hesperian Blvd # 270, Hayward 94541 | (510) 670-8794 |