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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

16,624 MW
at 9:00 a.m. EST
August 20, 2014

up

5-minute Ontario Demand

17,124 MW
at 9:25 a.m. EST

down

Projected Ontario Demand (next hour)

17,346 MW
at 10:00 a.m. EST

up

Today's Projected Peak (Ontario)

19,037 MW
at 8:00 p.m. EST

Today's Projected Minimum (Ontario)

12,702 MW
at 3:00 a.m. EST

Market Demand

18,602 MW
at 9:00 a.m. EST

up

5-minute Market Demand

19,309 MW
at 9:25 a.m. EST

down

Today's Projected Peak (Market)

21,209 MW
at 5:00 p.m. EST

Today's Projected Minimum (Market)

15,067 MW
at 12:00 a.m. EST

Operating Reserve Requirement

1,418 MW
at 10:00 a.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

26,722 MW

up

Generator Availability

27,768 MW
at 8:00 a.m. EST

down

Nuclear Output

11,427 MW
at 8:00 a.m. EST

down

Hydro Output

3,812 MW
at 8:00 a.m. EST

up

Gas Output

1,210 MW
at 8:00 a.m. EST

up

Wind Output

354 MW
at 8:00 a.m. EST

down

Other Output

198 MW
at 8:00 a.m. EST

up

Hourly Imports

1,304 MW
at 9:00 a.m. EST

up

Hourly Exports

2,003 MW
at 9:00 a.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

$19.65/MWh
at 9:00 a.m. EST
August 20, 2014

up

Market Clearing Price
(5-minute price)

$25.72/MWh
at 9:20 a.m. EST

up

Global Adjustment
(First Estimate)

$61.08/MWh
August

Global Adjustment
(Actual)

$62.56/MWh
July

Average Weighted Price

$20.86/MWh
(2.09 cents/kWh)
for August

down

Hourly Uplift Charge Estimate

$.00/MWh
at 5:00 a.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)
154.68 $/MWh
August 2014
Off Peak
8 p.m. to 8 a.m.
(M-F, weekends, holidays)
93.04 $/MWh
August 2014
Actual   Projected
Market Demand (MW)
Hour EndingDemand 
116,464 717,559 1320,365 1920,883
216,053 818,352 1420,590 2021,172
315,629 918,602 1520,734 2120,538
415,770 1019,703 1621,155 2218,932
515,716 1119,570 1721,209 2317,202
616,266 1220,078 1821,126 2415,067
Download: XML

The Market Day

August 20, 2014

Dispatch   Pre-Dispatch
HOEP Price ($/MWh)
Hour EndingPrice 
114.35 717.34 1332.18 1932.73
214.35 816.45 1435.60 2032.74
314.10 919.65 1535.60 2132.71
414.35 1032.74 1634.88 2231.77
514.23 1130.13 1732.79 2314.37
614.92 1232.18 1832.72 24-4.20
Download: XML
Actual   Projected
Ontario Demand (MW)
Hour EndingDemand 
113,473 715,089 1317,954 1918,769
213,146 816,147 1418,253 2019,037
312,943 916,624 1518,481 2118,669
412,895 1017,346 1618,812 2217,494
513,303 1117,270 1719,006 2316,018
614,164 1217,585 1818,953 2414,806
Download: XML

Peak Tracker

Top 5 Allocated Quantity of Energy Withdrawn (AQEW) Peaks from
May 1, 2014 to April 30, 2015
RankDateHour EndingAQEW (MW)
1Jul 22, 20141720,744
2Jun 30, 20141720,457
3Jul 2, 20141420,144
4Jul 21, 20141819,873
5Jul 1, 20141719,783
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.