| Business | Phone |
| Afscme 840 E St # 7, Eureka 95501 | (707) 443-7371 |
| Building & Construction Trades 840 E St, Eureka 95501 | (707) 443-8128 |
| Ca State Employees Assn 840 E St # 6, Eureka 95501 | (707) 445-0772 |
| United Domestic Workers 840 E St, Eureka 95501 | (707) 445-3115 |
| Plumbers & Fitters 832 E St, Eureka 95501 | (707) 442-4680 |
| Painters & Allied Trades 840 E St, Eureka 95501 | (707) 442-5284 |
| Operating Engineers Local No 3 2367 Harrison Ave, Eureka 95501 | (707) 443-7328 |
| Machinists' Local 840 E St, Eureka 95501 | (707) 443-9181 |