The power grid that supplies the electric current coming into your home or business is designed to maintain a dynamic balance between the consumer demand for electricity and the amount being supplied by generators. The charts on these pages present an approximate picture of this dynamic balance. On the demand side, the day's forecast load is shown along with the current load, updated in real time. The available supply is estimated as a sum of the on-line capacity in the region plus the net imports.

Each of the five deregulated market areas is displayed. A composite picture for the entire country is being developed. All data displayed on these pages is publicly available through the websites of the regional Independent System Operators (ISO). The different ISO's do not all provide the same information, and for some regions, additional information such as real-time prices or a record of generation outages is also available. The graphs follow as closely as possible a uniform format.

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