| Business | Phone |
| Black Hawk County Union Cncl 1695 Burton Ave, Waterloo 50703 | (319) 232-2484 |
| Carpenters 1695 Burton Ave, Waterloo 50703 | (319) 232-9510 |
| Operating Engineers 1695 Burton Ave, Waterloo 50703 | (319) 232-4919 |
| Plumbers & Pipe Fitters 1695 Burton Ave, Waterloo 50703 | (319) 233-7551 |
| Teamsters 306 Jefferson St, Waterloo 50701 | (319) 235-6209 |
| Teamsters Chauffeurs & Helpers 308 Jefferson St, Waterloo 50701 | (319) 232-1079 |
| Gmp 1695 Burton Ave, Waterloo 50703 | (319) 233-1842 |
| United Automobile Workers 2615 Washington St, Waterloo 50702 | (319) 233-3049 |
| United Automobile Workers 3116 Kimball Ave, Waterloo 50702 | (319) 233-5236 |
| United Food Workers 1695 Burton Ave, Waterloo 50703 | (319) 233-3397 |