Windmills are best situated in places where there is lots of wind. Typically, large bodies of water provide excellent wind. For Toronto, Lake Ontario is the most likely candidate for siting windmills and the east side of the city has a wide expanse of open water, a better angle to the shoreline, and a well located shoal that makes a good base for the windmills. The anemometer test would determine whether wind speeds are sufficient to warrant developing an actual plan to put windmills in the lake.