| Business | Phone |
| Amalgamated Industrial Workers 811 N La Cadena Dr, Colton 92324 | (909) 422-0866 |
| Apprentice & Journeyman Fund 225 S Rancho Ave, Colton 92324 | (909) 824-0360 |
| Brotherhood-Locomotive Engrs 404 N 7th St, Colton 92324 | (909) 514-0274 |
| Communications Workers-America 190 W G St, Colton 92324 | (909) 422-8960 |
| Plumbers & Steamfitters 223 S Rancho Ave, Colton 92324 | (909) 825-0359 |