Ontario wants new data centres in their own rate class, and the comment window shuts September 12

Ontario's Ministry of Energy and Mines posted a consultation notice on August 13 proposing a separate electricity rate class for new large data centres plus a government approval step before those facilities can connect or reconnect to the grid ^[1][2][5]. Comments close September 12 under Environmental Registry number 026-0853, so the window to argue about cost allocation is roughly a month long ^[3][4][14].

The threshold matters more than the paperwork. The ministry uses projects greater than 1 MW as its example cut-off, which is low enough that Premier Doug Ford described it as applying to essentially every newly built AI-capable data centre, according to The Globe and Mail ^[6][7]. One megawatt is a single dense rack row in modern GPU terms, not a campus. If the number survives consultation, the rate class is not an edge case for hyperscale projects; it is the default treatment for anything doing training or inference at scale.

The stated purpose is that sector growth should not raise bills for existing customers, with new large facilities covering their electricity-related costs rather than shifting them to the existing ratepayer base ^[5][8]. The Globe and Mail reported that Ford said developers would need to fund necessary infrastructure upgrades, and that the province has ruled out financial incentives for construction ^[9][10]. BNN Bloomberg reported Ford saying Ontario would not give new data centres a "freebie" while also calling the facilities part of the "way of the future" ^[11].

The approval side is the part that changes site selection arithmetic. The province is considering a regulation under the Electricity Act, 1998 requiring approval before connection, and the notice states that facilities failing to meet the eventual requirements would be unable to connect or reconnect ^[2][12]. Assessment would weigh a project's economic and strategic value to the province, communities and Ontarians ^[13]. BetaKit reported the proposed playbook organises that assessment around three pillars: economic development, digital sovereignty, and community benefits ^[15]. The Globe and Mail reported the framework would also consider local economic benefits and environmental standards covering water consumption and noise ^[16].

Municipalities get input but not a decision. CityNews reported that municipal councils would not receive a veto under the announced framework ^[17]. That is happening against local action: BNN Bloomberg reported Oakville enacted a one-year data centre moratorium and that Mississauga was scheduled to consider its own pause, with reporting citing resident concerns about noise, water, heat, air pollution, grid strain and utility costs ^[18][19]. A provincial approval that overrides a council does not eliminate the political friction; it relocates it.

What to watch: whether the 1 MW example survives as the actual threshold, and how "electricity-related costs" gets defined, because the difference between paying for a dedicated feeder and paying an allocated share of system upgrades is the difference between a tolerable capital line and a project that moves to another province. Ontario has published no final regulation or final framework ^[20], and the scope, eligibility thresholds, technical approval criteria and implementation timetable all remain open ^[21]. Anyone with a shortlisted Ontario site should treat the September 12 date as the last cheap opportunity to influence any of it ^[3].