In addition to dealing with the Ontario export tariff, NYISO officials are scrambling to prepare for the possible imposition of a 10% duty on electricity imported from Canada. The organization has petitioned federal regulators for authority to collect that 10% tariff if it takes effect.

Ontario's leadership threatened with an additional surcharge for electricity they export to a few neighboring U.S. states.

Ontario Premier Doug Ford says he's going ahead with plans to impose 25% tariffs on electricity sent to Michigan, New York and Minnesota.

Experts warn that an abrupt halt in electricity exports could cause price spikes in major U.S. cities like Buffalo, Seattle, and Portland.

Minnesota, along with Michigan and New York, are at risk of getting slapped with a 25% surcharge for electricity from Ontario​ if President Trump's ongoing tariff war doesn't end by Monday.

Ontario will slap a 25% export tax on electricity it sends to 1.5 million homes in Minnesota, Michigan and New York in retaliation for U.S. tariffs, said Doug Ford, leader of the Canadian province. Fo

Ontario is threatening retaliatory levies on electricity supplied to the state — just as the city’s main utility is seeking approval for higher bills.