A public health advisory regarding arsenic levels was released on Monday.
The Department of Health and Social Services is cautioning the public about arsenic levels in lakes around Dettah, Ndilo and Yellowknife.
Some of the newfound data actually dates back to 1989, showing levels are too high for fishing or swimming in Kam Lake. No current levels were released.
Long lake is safe for swimming and recreational fishing but its arsenic levels are above Health Canada’s drinking water guidelines.
A similar advisory released last year urged people not to eat berries, mushrooms for at least a 50 kilometer radius from the Giant Mine site.
GNWT says tap water is safe to drink because it’s collected from the Yellowknife River which is upstream from Giant Mine.
The Yellowknives Dene First Nation has also been conducting its own survey of arsenic levels in animals fish, and water this past year. The results haven’t been released yet.