All planned IT system outages are posted in the table below as soon as they are scheduled. Participants are able to view outage notification details for the same day as well as for those planned in the future. Information on past outages (as of July 1, 2009) are archived for 60 days.
This page will be updated if the outage is unable to proceed as planned and needs to be re-scheduled. For more information please contact IESO Customer Relations at 905-403-6900 or 1-888-448-7777.