Exxon’s Canadian Affiliate Struggles With Oil Sands Wastewater Leak

Indigenous groups criticize delay in revealing full extent of toxic seepage

Mining in 2017 at the Kearl oil sands project in Alberta, one of the largest in Canada. Photo: LARRY MACDOUGAL/ASSOCIATED PRESS

TORONTO—Exxon Mobil Corp.’s Canadian affiliate, Imperial Oil Ltd., is struggling to contain the environmental and social effects of a continuing leak of toxic wastewater at one of its projects in the oil sands of western Canada.

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