CAISO (California) Hourly Actual and Forecast Demand

Updated Daily
TAC Areas
Since 2016

Hourly consolidated demand data for actual and forecast values for CAISO trade areas and regions

This is an example data from history; subscriber data is updated daily
Charts of CAISO (California) Hourly Actual and Forecast Demand


  • Short term commitments (forecast) of demand
  • Seasonal average and distribution of actual demand and forecast errors
  • Historical trade area and regional load analysis


CAISO (California) Hourly Actual and Forecast Demand


This data product offers hourly actual and forecast demand in California's Transmission Access Charge Areas (TAC) and Balancing Authority Areas.

Electricity demand is measured in kilowatts (kW) and represents the rate at which electricity is consumed. Meeting the growing demand for energy in a safe and environmentally responsible manner is a key challenge and a reliable grid operation is dependent on adequate supply and flexible resources.

TAC - EIM Coverage

This product provides hourly actual and forecast demand in CAISO TAC (Transmission Access Charge) areas and EIM (Energy Imbalance Market) regions:

Type Code Name
EIM AZPS Arizona Public Service
EIM BCHA Powerex
EIM IPCO Idaho Power
EIM PACE PacifiCorp East
EIM PACW PacifiCorp West
EIM PGE Portland General Electric
EIM PSEI Puget Sound Energy
EIM SCL Seattle City Light
EIM SRP Salt River Project
TAC MWD-TAC The Metropolitan Water District of Southern California - TAC
TAC PGE-TAC Portland General Electric - TAC
TAC SCE-TAC Southern California Edison - TAC
TAC SDGE-TAC San Diego Gas & Electric - TAC
TAC VEA-TAC Valley Electric Association - TAC

Metric Coverage

For each regional or TAC, this product provides:

  • Actual Demand
  • Day Ahead Demand
  • 2 Days Ahead Demand
  • 7 Days Ahead Demand

Data Collection Methodology

  • Data is cleansed and organized to provide a ready for analysis dataset
  • Both historical and current dates of operations are aggregated
  • Actual and forecast demands are aggregated
  • All date and hours are quality checked for consistency and completeness
  • Data updates from CAISO every day

California Independent System Operator (CAISO) is a non-profit Independent System Operator serving California. It oversees the operation of California's bulk electric power system, transmission lines, and electricity market generated and transmitted by its member utilities.

Key Features

  • Includes hourly actual and forecast demand
  • Updated daily at 5:00 PM ET
  • Historical data goes back to 2016
  • Covers all TAC Areas and EIM regions

Data Provider

Alta Bering

Until a few decades ago majority of us were employed in real world businesses. Alta Bering came out of a history of production technology and reconciled it with sophisticated algorithmic math, an after-thought in enterprise system functionality.We believe efficiency is key to mitigating scarcity economics. In the early 2000s, we set our sights on helping companies achieve higher efficiency and growth, not just growth.Today we enable advanced prescriptive analytics for data scientists and enterprise cloud platforms. Our goal is to help business analysts step up to corporate responsibility.Contact us for more about how we deliver our predictive analytics consulting to large and medium sized clients.

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