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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
September 19, 2025 09/17/2025 01:48 PM EDT CSV
September 05, 2025 09/05/2025 12:38 PM EDT CSV
September 06, 2025 09/06/2025 07:20 PM EDT CSV
September 07, 2025 09/07/2025 04:57 PM EDT CSV
September 08, 2025 09/08/2025 03:27 PM EDT CSV
September 09, 2025 09/09/2025 04:27 PM EDT CSV
September 10, 2025 09/10/2025 03:55 PM EDT CSV
September 11, 2025 09/11/2025 09:20 AM EDT CSV
September 12, 2025 09/12/2025 09:24 AM EDT CSV
September 13, 2025 09/13/2025 09:31 AM EDT CSV
September 14, 2025 09/14/2025 09:35 AM EDT CSV
September 15, 2025 09/15/2025 09:07 AM EDT CSV
September 16, 2025 09/16/2025 09:12 AM EDT CSV
September 17, 2025 09/17/2025 01:48 PM EDT CSV
September 18, 2025 09/17/2025 01:48 PM EDT CSV