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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
December 09, 2025 12/07/2025 09:06 AM EST CSV
November 25, 2025 11/25/2025 09:16 AM EST CSV
November 26, 2025 11/26/2025 12:30 PM EST CSV
November 27, 2025 11/27/2025 10:44 PM EST CSV
November 28, 2025 11/28/2025 09:23 AM EST CSV
November 29, 2025 11/29/2025 09:24 AM EST CSV
November 30, 2025 11/30/2025 01:42 PM EST CSV
December 01, 2025 12/01/2025 11:31 AM EST CSV
December 02, 2025 12/02/2025 11:26 AM EST CSV
December 03, 2025 12/03/2025 09:17 AM EST CSV
December 04, 2025 12/04/2025 12:39 PM EST CSV
December 05, 2025 12/05/2025 12:50 PM EST CSV
December 06, 2025 12/06/2025 07:36 PM EST CSV
December 08, 2025 12/07/2025 09:06 AM EST CSV
December 07, 2025 12/07/2025 09:06 AM EST CSV