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Three-Day Reliability Region Demand Forecast

Download the ISO's hourly demand forecast for each day as forecasted in-day and the preceding two days, broken down by reliability region. The region's transmission system is divided into eight reliability regions that reflect the system's operating characteristics and major constraints. New England's load zones, which represent aggregations of pricing nodes within specific areas, generally correspond to these reliability regions.

 

Note: NEMASSBOST = Northeast Massachusetts and Boston Area Reliability Region; SEMASS = Southeast Massachusetts Reliability Region; WCMASS = Western/Central Massachusetts Reliability Region; % = the reliability region's demand as a percentage of the zonal total. The demand included in the forecast is in megawatts (MW).

Forecasts prior to May 24, 2017, can be found on the Three-Day Reliability Region Demand Forecast Archive.

 

 
Three-Day Reliability Region Demand Forecast
Description Timestamp Download
August 01, 2025 07/30/2025 04:33 PM EDT CSV
July 18, 2025 07/18/2025 04:02 PM EDT CSV
July 19, 2025 07/19/2025 09:06 AM EDT CSV
July 20, 2025 07/20/2025 09:13 PM EDT CSV
July 21, 2025 07/21/2025 09:13 PM EDT CSV
July 22, 2025 07/22/2025 09:51 AM EDT CSV
July 23, 2025 07/23/2025 09:40 AM EDT CSV
July 24, 2025 07/24/2025 09:22 AM EDT CSV
July 25, 2025 07/25/2025 08:46 PM EDT CSV
July 26, 2025 07/26/2025 05:42 PM EDT CSV
July 27, 2025 07/27/2025 09:23 AM EDT CSV
July 28, 2025 07/28/2025 09:24 AM EDT CSV
July 29, 2025 07/29/2025 05:02 PM EDT CSV
July 30, 2025 07/30/2025 04:33 PM EDT CSV
July 31, 2025 07/30/2025 04:33 PM EDT CSV