Estimates of existing and potential impact of acidification on the freshwater fishery resources and their use in eastern Canada

There are over 700,000 lakes in Canada, east of the Ontario-Manitoba border and south of latitude 52. This region supports much of Canada's freshwater fishery resources, mostly in acid-sensitive habitat. Of these lakes, half have alkalinities less than 50 μeq.L−1 and 150,000 have a pH less than 6. There are 14,000 acidic lakes i.e., with a pH less than 4.7.