This salary information comes to you courtesy of the Salary Experts and includes information for both Canada and the United States.
If you want more salary information, try to contact individual workers or unions that work in the industries you want to enter. This information is often more applicable to you than the broad survey information on the Internet.
That said, this survey information is still useful and can help you during salary negotiations. Here are some sites that can help. Note that many of these sites can also help with your job search.
WorkinginCanada: This excellent HRDC site lets you browse different occupations and gives information on earnings, future outlook, and average unemployment.
Strategis - Industry Information: This great Industry
Canada site can help you find general information on industries that interest
Directory of Business and Trade Associations / Organizations: You'll find business, trade, and professional consumer organizations here.
SalaryReview.com: You can obtain a wide range of reports here, from salary to cost of living, but you will have to buy them.