Ontario · Public IESO reports
Demand, post-Market-Renewal zonal prices, official ICI tracker status, and a next-day reference model that remains hidden until measured gates pass.
Real-time zonal price is not a customer's final Ontario electricity price. This page is not an operational alert.
Chart suppressed
The Data Lab fails closed when a required source is missing or past its freshness limit. We keep attribution and health evidence visible, but do not render a chart from stale data.
Affected source IDs: ieso-realtime-demand, ieso-realtime-zonal-price
Health checked:
Methodology
Real-time demand and zonal-price intervals join only on matching delivery date, hour ending, and five-minute interval. Blank future values remain absent; zero and negative prices remain unchanged.
The next-day model takes the median for each hour from the prior four matching weekdays, adjusted by a recent-level ratio capped at 0.90–1.10. The ratio is the mean demand on the latest complete day divided by the mean demand on the complete day seven days earlier. Rolling-origin evaluation uses the prior 60 calendar days against a same-hour-seven-days-ago baseline, without target-day or future observations.
Zonal energy price is one market component, not a customer's final bill. ICI tracker entries and the model are never operational alerts, settlement calculations, or facility curtailment advice.
Provenance
Read the versioned JSON dataset endpoint. Source “data as of” timestamps are distinct from GuildBuild fetch times.
Copyright © 2004-2022 Independent Electricity System Operator, all rights reserved. This information is subject to the Terms of Use set out in the IESO’s website (www.ieso.ca). GuildBuild transformed the public report and is solely responsible for this reference build; IESO does not endorse or warrant it.
Copyright © 2004-2022 Independent Electricity System Operator, all rights reserved. This information is subject to the Terms of Use set out in the IESO’s website (www.ieso.ca). GuildBuild transformed the public report and is solely responsible for this reference build; IESO does not endorse or warrant it.
Copyright © 2004-2022 Independent Electricity System Operator, all rights reserved. This information is subject to the Terms of Use set out in the IESO’s website (www.ieso.ca). GuildBuild transformed the public report and is solely responsible for this reference build; IESO does not endorse or warrant it.
Copyright © 2004-2022 Independent Electricity System Operator, all rights reserved. This information is subject to the Terms of Use set out in the IESO’s website (www.ieso.ca). GuildBuild transformed the public report and is solely responsible for this reference build; IESO does not endorse or warrant it.
Copyright © 2004-2022 Independent Electricity System Operator, all rights reserved. This information is subject to the Terms of Use set out in the IESO’s website (www.ieso.ca). GuildBuild transformed the public report and is solely responsible for this reference build; IESO does not endorse or warrant it.