That number seems extremely low! I'm positive that there are way more than that. That number even seems low for about 45 years ago when they were at their all time low. What was the web site that you got this information from?
In 1985, according to a study by Grier, there were approximately 500 - 1000 PAIRS of Bald Eagles nesting in North Western Ontario alone. And the population has been steadily increasing since the early 1970's to present. According to the 2007 Breeding Bird Atlas, the minimum number of documented active Bald Eagle nests in Ontario rose from 719 to 1,193 between 1990 and 1998, an increase of 65% in less than a decade. It is clear that the Bald Eagle is still increasing in numbers on Ontario.