About the Wholesale Electricity Market Portal

The Wholesale Electricity Market Portal was launched by the U.S. Energy Information Administration (EIA) in March of 2024 to help users examine and access electricity markets data in the seven Regional Transmission Organizations (RTO) and Independent System Operators (ISO).

• Independent System Operator - New England (ISO-NE)
• New York Independent System Operator (NYISO)
• PJM Interconnection (PJM)
• Midcontinent Independent System Operator (MISO)
• Southwest Power Pool (SPP)
• Electric Reliability Council of Texas (ERCOT)
• California Independent System Operator (CAISO)

Key data sets include:

• Day-ahead locational marginal prices (LMP)
• Real-time LMPs
• Actual load/demand
• Forecast load/demand
• Generation fuel mix
• Interchange
• Temperature of major cities

The Portal draws on data that EIA has gathered from the RTO/ISOs' publicly available data. The temperature data is gathered by EIA from the U.S. National Oceanic and Atmospheric Administration (NOAA).

Data Availability

The Portal data is extracted from data published by the RTO/ISOs. Data availability varies by data set and RTO/ISO. Some data is made available by the RTO/ISOs on a sub-hourly real-time basis. The most frequently the Portal will update data is hourly. Some data may be updated daily, weekly, monthly or in longer time periods. Data are available via the dashboards linked above as well as via flat files for bulk download. Data are not currently available via the API.

Data Quality

The data is gathered from RTO/ISOs and should be considered preliminary. EIA does not verify the quality of the data and it is made available "as-is". Neither EIA nor the RTO/ISOs are responsible for reliance on the data for any specific use.

Data Use and Republication

EIA accesses data from the RTO/ISOs publicly available websites and provides a limited history for public use.

• Contact: Electricity data experts