Student salary while on co-op is up to the employers' discretion. The Professional Practice faculty advisor responsible for the major you are interested in will be happy to help you determine salary specifications based on industry averages, if you so desire.
Also note that some companies will assist students with housing and relocation. This assistance may include a stipend or monthly allowance to help offset the cost of relocation if required for the position.
This survey provides the average salary for students, broken down by major, as well as the minimum and maximum salary received for that major.