The study by two Environment Canada scientists analyzed decades worth of data from different sources to conclude levels of the potent toxin are stable and may even be declining in lakes near the massive developments.
It says better monitoring is needed to really know what is going on in the oilsands region.
Both the federal and Alberta governments are developing better ways to measure the environmental impact of the oilsands.
A 2009 research paper had suggested that mercury levels had increased by more than one-quarter between 1975 and 2005.
Also on HuffPost