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Select Recent and Historical Reports: Click the links below to go to the latest version of select reports within the IESO Public Reports Site (.xml) and historical reports (.csv). IESO Public Reports contain a day or hour`s worth of data and historical reports provide data from 2002 to the present. For more information, the Data Directory provides a listing and explanation of all reports below as well as all other IESO reports.

Demand


Supply


Price


 

Recent Reports



Historical Reports

Demand Demand Inforamtion

Demand

Ontario Demand – Hourly and 5-Minute: Represents the energy supplied by the IESO-Administered Market to meet demand within Ontario. The IESO calculates Ontario Demand by subtracting scheduled exports from Total Market Demand. It is also equal to the sum of all loads (consumption) within Ontario supplied from the market, plus all line losses incurred on the IESO-controlled grid.

Market Demand – Hourly and 5 Minute: Represents the total energy supplied by the IESO-Administered Market. The IESO calculates Market Demand by summing all output from generators registered in the market plus all scheduled imports to the province. It is also equal to the sum of all load supplied from the Market plus exports from the province, plus all line losses incurred on the IESO-controlled grid.

Today’s Projected Peak (at time): Represents the projected maximum amount of electricity required to meet peak Ontario and Market Demand for the day. Project demand can change throughout the day as the weather, system status and other factors that affect demand and supply also change. Where two intervals have the same projected peak, the earlier hour will be reported.

Today’s Projected Minimum (at time): Represents the lowest projected amount of electricity required to meet Ontario and Market Demand for the day.

Operating Reserve Requirement: Generation or load reduction capacity that the IESO can call upon on short notice to restore a balance between supply and demand, in the event of an unexpected demand increase or generator outage. The IESO purchases defined amounts of Operating Reserve from participants via three real-time markets.


Ontario Demand

21,293 MW
at 6:00 p.m. EST
July 22, 2014

down

5-minute Ontario Demand

21,065 MW
at 6:25 p.m. EST

up

Projected Ontario Demand (next hour)

21,113 MW
at 7:00 p.m. EST

down

Today's Projected Peak (Ontario)

21,486 MW
at 5:00 p.m. EST

Today's Projected Minimum (Ontario)

13,923 MW
at 4:00 a.m. EST

Market Demand

24,033 MW
at 6:00 p.m. EST

down

5-minute Market Demand

23,260 MW
at 6:25 p.m. EST

up

Today's Projected Peak (Market)

24,552 MW
at 5:00 p.m. EST

Today's Projected Minimum (Market)

16,492 MW
at 3:00 a.m. EST

Operating Reserve Requirement

1,418 MW
at 7:00 p.m. EST

nochange

Supply Supply Inforamtion

Supply

Generator Availability at Peak: Total amount of Ontario electricity generation available to produce energy at the predicted demand peak hour.

Generator Availability (at time): Total amount of Ontario electricity generation available to produce energy as per the previous hour’s output reports.

Output (by Fuel Type): Energy production by generators, 20 MW or greater, by fuel type (nuclear, hydro, gas, wind and other – mostly woodwaste), published 30 minutes following the dispatching hour.

Hourly Imports: Total amount of scheduled electricity imported into Ontario, from neighbouring jurisdictions – Michigan, Manitoba, Minnesota, Quebec and New York.

Hourly Exports: Total amount of scheduled electricity exported from Ontario to neighbouring jurisdictions - Michigan, Manitoba, Minnesota, Quebec and New York.


Generator Availability at Peak

28,296 MW

up

Generator Availability

29,524 MW
at 5:00 p.m. EST

down

Nuclear Output

11,219 MW
at 5:00 p.m. EST

up

Hydro Output

5,051 MW
at 5:00 p.m. EST

down

Gas Output

4,565 MW
at 5:00 p.m. EST

up

Wind Output

722 MW
at 5:00 p.m. EST

down

Other Output

258 MW
at 5:00 p.m. EST

up

Hourly Imports

1,847 MW
at 6:00 p.m. EST

down

Hourly Exports

2,854 MW
at 6:00 p.m. EST

down

Price Price Inforamtion

Price

Current Hourly Ontario Energy Price (HOEP): Charged to Local Distribution Companies and large customers who use more than 250,000 kWh a year. HOEP is also paid to self-scheduling generators. HOEP is the hourly arithmetic average of the uniform Ontario energy price determined for each of the 12, 5-minute dispatch intervals in a particular hour.

Market Clearing Price (5-Minute Price): Calculated every five minutes, 12 times an hour. This is the price paid to generators and charged to dispatchable load.

Global Adjustment: Accounts for the difference between the market price and the rates paid to regulated and contracted generators and for conservation and demand management programs.

The First Estimate: Published at the beginning of the month and incorporates a forecast of Ontario demand to project the revenue needed to cover the global adjustment costs for that month. It also takes into account variances from previous months. Actual Global Adjustment costs for the previous month are also posted.

Average Weighted Price (Month): The Hourly Ontario Energy Price weighted by the amount of electricity used throughout the province within each hour, with adjustments.

Hourly Uplift Settlement Charge: The Estimated Hourly Uplift Settlement Charges presents hourly estimates of this charge which covers the costs of Operating Reserve, Congestion Management Settlement Credits, Intertie Offer Guarantee payments (IOG), and other hourly costs such as energy losses on the IESO-controlled grid.


Current Hourly Ontario Energy Price

$34.38/MWh
at 6:00 p.m. EST
July 22, 2014

down

Market Clearing Price
(5-minute price)

$33.77/MWh
at 6:20 p.m. EST

down

Global Adjustment
(First Estimate)

$59.76/MWh
July

Global Adjustment
(Actual)

$60.25/MWh
June

Average Weighted Price

$24.03/MWh
(2.40 cents/kWh)
for July

down

Hourly Uplift Charge Estimate

$4.00/MWh
at 5:00 p.m. EST

nochange

Demand Overview

Read more about Ontario’s demand trends, records and seasonal peaks.

Learn more »

Supply Overview

Learn about Ontario’s current supply mix, a history of generation capability, and yearly imports and export values.

Learn more »

Price Overview

Historical prices including monthly average prices, Global Adjustment charge, and other electricity-related prices.

Learn more »

Data in Action

The effects of demand response (DR) is seen in the control room every day – on a typical day, demand holds fairly flat until 7 p.m., then decreases as off-peak price period starts. With market incentive programs such as Global Adjustment Allocation and DR3, the IESO has seen at least 900 MW of DR on the hottest days of the summer.

Recent Summaries

Monthly HOEP Peaks

On Peak
8 a.m. to 8 (M-F)
46.31 $/MWh
July 2014
Off Peak
8 p.m. to 8 a.m.
(M-F, weekends, holidays)
125.28 $/MWh
July 2014
Actual   Projected
Market Demand (MW)
Hour EndingDemand 
116,742 718,391 1322,984 1923,585
216,333 819,683 1423,368 2023,468
316,150 920,576 1523,393 2123,039
416,285 1021,800 1623,690 2221,733
516,616 1122,516 1724,140 2319,772
616,945 1222,908 1824,033 2418,643
Download: XML

The Market Day

July 22, 2014

Dispatch   Pre-Dispatch
HOEP Price ($/MWh)
Hour EndingPrice 
120.34 711.66 1332.15 1936.38
214.30 830.28 1432.07 2032.18
314.10 931.92 1532.15 2131.88
413.02 1032.74 1632.26 2231.85
513.69 1136.88 1736.12 2331.96
612.50 1235.07 1834.38 2431.81
Download: XML
Actual   Projected
Ontario Demand (MW)
Hour EndingDemand 
114,828 716,054 1320,444 1921,113
214,331 817,422 1420,436 2020,905
313,799 918,394 1520,582 2120,858
413,758 1019,227 1620,866 2219,753
513,990 1120,049 1721,300 2318,185
614,627 1220,392 1821,293 2416,856
Download: XML

Peak Tracker

Top 5 Allocated Quantity of Energy Withdrawn (AQEW) Peaks from
May 1, 2014 to April 30, 2015
RankDateHour EndingAQEW (MW)
1Jun 17, 20141719,439
2Jun 24, 20141619,284
3Jun 2, 20141718,670
4Jun 18, 20141718,627
5May 27, 20141718,446
Download: XML

The IESO uses the "Hour Ending" naming convention for the hours in a day. For example, Hour 1 is from 12 a.m. to 1 a.m., Hour 2 is from 1 a.m. to 2 a.m. Hours 1-24 are the hours from midnight one day through midnight the next day. Eastern Standard Time is used year round.