Last May, Imperial reported discoloured water outside one of its tailings ponds and failed to keep area First Nations apprised of the ongoing investigation.

The Alberta Energy Regulator has cited an energy company for causing a series of earthquakes, including the largest recorded tremblor in the province's history.

Alberta's information commissioner has started an investigation into how the province's energy regulator notified the public about tailings pond releases at Imperial Oil's Kearl mine.

Federal Environment Minister Steven Guilbeault has repeated his call for a stronger federal presence when it comes to environmental monitoring and communications in the oilsands, following a pair of wastewater releases from Imperial Oil's Kearl mine in Alberta.

Earlier this month, Rural Municipalities Alberta released figures showing that energy firms owed $268 million in back taxes in 2022, a figure that is up more than six per cent from 2021. 

The Alberta and federal governments say they will work together to understand what happened around a nine-month delay in notifying the public about toxic seepage from an oilsands tailings pond.

Recent leaks of toxic tailings from northern Alberta oilsands mines have revealed serious flaws in how Canada and Alberta look after the environment, observers say.

Alberta's nine-month silence over two releases of toxic oilsands tailings water is "worrisome," says federal Environment Minister Steven Guilbeault.